Safety 1st ContinuumPrice$140-$180.

Type: Convertible seat, booster.

Limits: 5 to 40 lbs. rear facing, 22 to 50 lbs.
forward facing, 40 to 80 lbs. as a booster.

NHTSA ease of use rating: Not yet.

Pros: Three-in-one seat works from birth to 80 lbs. Holders on side of seat keep harness to side for easier access. Machine washable and dryable pad. No rethread harness (except in lowest position). Affordable price.

Cons: Lower harness weight limit than sister seat (Go & Grow). Fewer recline positions than competitors; when reclined, takes up a lot of space in back seat.

Comments: This seat is a down-scaled, lower-priced version of the Safety 1st Go & Grow—the Continuum utilizes the same shell and base as the Grow & Go, but only works to 50 lbs. with a five-point harness versus 65 lbs. for Grow & Go.

Other differences: the Continuum has only one cup holder, less fancy fabrics and omits the infant insert/body pillow. You still get the harness holder, easily removable fabric pad for cleaning and three-position recline.

We gave the Go & Grow an A rating, but we’re less enthusiastic about this seat. Our big issue is the harness—we like the 65 lb. harness limit on the Go & Grow versus the 50 lb. limit here. Yes, this seat runs $20 to $40 less, but that doesn’t seem like a big enough price differential to make the sacrifice. On the other hand, if you are planning to use a separate infant car seat, then the lack of an infant body support pillow here doesn’t make much difference.

If you are sold on an all-in-one seat and plan to use it from birth, the Safety 1st Go & Grow is probably a better bet for the additional $20-$40. Rating: B