Cosco Summit High Back Booster

The best professional review of the Cosco Summit High Back Booster comes from "Baby Bargains," a book by Denise and Alan Fields that gives parents well-researched advice on baby gear. While the authors don't actually test the seats they review, they do take into account a variety of factors, including performance history and owner feedback. There are also some useful parent-written reviews at sites like Amazon.com and Epinions.com.

The Cosco Summit High Back Booster gets good reviews from experts and mixed comments from parents. If your child has outgrown his convertible car seat but is not yet tall enough or heavy enough for a booster seat, this Cosco car seat is a front-facing seat with a five-point harness for children 22 to 40 pounds; it then converts to a booster seat for kids from 30 to 100 pounds. Professional reviewers note that children are likely to outgrow the standard-height harness straps before they get close to 40 pounds, however. Parents say the Summit is a good value, but many express concerns about twisting harness straps. If your child weights at least 40 pounds, consider the top-rated Graco TurboBooster SafeSeat Step 3 (*est. $60).