Based on 2 independent scored tests: Insurance Institute for Highway Safety (IIHS) (2017), NHTSA (National Highway Traffic Safety Administration) Car Seat Ease of Use Ratings (2022). The test scores average 94. With only 2 tests, the ranking score is pulled down a little until more testers confirm it.
This seat is certified for US & Canada. Car seats may only be used in the market they're approved for, so we don't link to shops in Czechia.
Each score as the tester published it, converted to our 0–100 scale. Weight is how much the result counts towards the score.
Not counted: Superseded by a newer test from the same source.
Also recommended: Wirecutter (The New York Times): Other backless booster seats worth considering, Car Seats for the Littles: Recommended.
How we turn these into one number: methodology. Tested 2017–2026.