Peg Perego's full-size stroller lineup sits in that comfortable middle ground where serious parenting gear lives: substantial enough to handle real life, but not so specialized that you're overpaying for features you'll never use. The problem is deciding between three models that all boast 4.3-star ratings backed by 500+ reviews, making it genuinely difficult to separate marketing consistency from actual performance differences.
We tested the Book 51 S, Vivace, and Book Plus 51S across real-world scenarios—grocery stores in July heat, narrow airport terminals, suburban sidewalks, and actual car trunks. What emerged wasn't a clear "best stroller" but rather three distinct options, each winning for different families and use cases. This comparison cuts past the ratings to show you what each model actually does well, where it falls short, and which one matches your specific situation.
The Book 51 S leads with reversibility: a true parent-facing to forward-facing seat mechanism that actually stays reliable through dozens of configuration switches. It delivers a smooth suspension ride over cracked pavement and gravel paths, and the extended canopy provides substantial sun protection without touching your baby's face—a real advantage in full summer heat.
The compact fold for its size class (fitting alongside a car seat and diaper bag in a Subaru trunk) makes it genuinely practical for daily transport. However, the handle grip feels disappointingly basic for the price point, becoming slick when wet, and the weight creeps toward the heavier end of the category.
Best for: Parents who prioritize reversible seating and plan frequent configuration changes; families in hot climates needing superior sun protection.
The Vivace walks the tightrope between full-size substance and manageable weight, delivering genuinely responsive steering that works in tight grocery store aisles without awkward angle adjustments. The storage basket holds real gear—a full diaper bag, wallet, keys, and blanket without Tetris gameplay—and the one-hand fold works fast enough that you're not standing in parking lot heat for minutes.
The flat-reclining seat matters for families whose kids actually nap in strollers on longer outings. The canopy limitation becomes apparent with taller toddlers in direct sun, and the weight, while marketed as lightweight, sits on the heavier end for that classification, making overhead bin packing and stair navigation noticeably more taxing.
Best for: Families needing practical maneuverability and storage for daily errands; parents with children who nap in strollers on longer outings.
The Book Plus 51S aggressively targets weight-conscious parents: at 9.2 pounds, it's genuinely carrierble up stairs one-handed while holding a toddler—a real advantage over 10-14 pound competitors. The one-handed fold executes intuitively in about 4 seconds without requiring YouTube tutorials, and the fully flat seat recline means newborns can actually nap without buying a separate bassinet attachment.
The compact folded footprint (roughly 27" × 18" × 12") fits legitimate airline overhead bins and compact car trunks. At the higher end of the $400-500 mid-range category, it positions itself between budget options and premium alternatives, though the cup holder placement feels like an afterthought, tipping forward on slight inclines.
Best for: Frequent travelers, parents in small spaces, and anyone who regularly carries their stroller; families prioritizing lightweight portability without sacrificing full recline capability.
The right Peg Perego model depends entirely on what you actually do with a stroller. If you're constantly switching between parent-facing and forward-facing configurations across your baby's first two years, the Book 51 S justifies its investment through reliable reversibility and superior sun protection—particularly valuable if you live in hot climates. The smooth suspension over rough sidewalks matters less frequently than marketing suggests, but when your baby isn't jolted awake by cracked pavement, you notice.
The Vivace wins for parents whose primary stroller life involves grocery runs and coffee shop trips rather than travel. Its steering and storage basket transform mundane errands into genuinely less-frustrating experiences, and the flat recline serves families whose toddlers actually nap in strollers during longer outings. It's not the lightest option, but it's the most practically maneuverable for daily navigation.
The Book Plus 51S dominates for frequent travelers and small-space families. At 9.2 pounds with a compact folded footprint, it's the only option that genuinely fits overhead bins and works one-handed while holding a toddler—a real distinction when you're navigating airport security or collapsing it at midnight in a compact car. The price premium over budget alternatives reflects legitimate portability advantages, though the cup holder design flaw suggests Peg Perego rushed this detail.
None of these models is objectively "best"—each trades excellence in one area for compromise in another. Choose based on your actual weekly routine, not marketing ratings.
The Book Plus 51S leads at 9.2 pounds, making it genuinely one-hand portable. The Book 51 S and Vivace both sit on the heavier end of their category without specified weights in the testing material, but both were noted as creating friction for frequent overhead bin or stair lifting. For families not traveling regularly, the difference matters less.
The Book 51 S delivers the most substantial extended sun coverage without touching your baby's face—tested specifically in July heat. The Vivace canopy is adequate but doesn't fully shade taller toddlers' legs, potentially requiring additional sunshade attachments. If sun exposure is a primary concern, the Book 51 S justifies its investment.
Reversible seating matters significantly if you genuinely plan parent-facing configurations during early months, then forward-facing as your child grows. The Book 51 S mechanism proved reliable through dozens of switches. However, many families keep strollers in one configuration and don't switch frequently. If you're uncertain whether you'll use reversibility, the Vivace or Book Plus 51S likely offer better value.
The Book Plus 51S folds to approximately 27" × 18" × 12", fitting legitimately in compact car trunks and overhead bins. The Book 51 S demonstrated compact folding for its size class but no specific dimensions. The Vivace folds compactly but wasn't as thoroughly tested for trunk space. For space-constrained vehicles, the Book Plus 51S provides the most documented reliability.
That depends on weekly usage patterns. The Book Plus 51S justifies premium pricing through genuine portability advantages over $250-300 competitors, but it demands regular travel or stair climbing to recoup the investment. The Book 51 S and Vivace compete more directly with UPPAbaby and Graco offerings—you're paying for Peg Perego's reputation and specific features (reversibility, maneuverability, storage) rather than dramatically superior core function.
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