I found these posts helpful:
https://carseatblog.com/46164/consum...-basic-rating/
https://csftl.org/consumer-reports-c...r-seat-report/
I had been meaning to read that a bit closer after seeing the article earlier this week.
I just rotated our car seats after reading the articles.
DS2 (7, 50+ pounds) was still harnessed in a frontier. We couldn't get the click tight to work on one of the seats last week, and were debating moving him up, and this just made the decision for us. I know he is closer to the 52 pound weight limit that didn't pull the harnesses through in the crash test, but I figure at higher speeds it might.
DS1 June 2009
DS2 June 2011