Deciding for my 5 YO for a roadtrip. Normally in Harmony Dreamtime highback. Foonf is already installed! She is 48 to 49 inches. Over 50 lbs. Straps about at shoulders. So, hmmm. Hard to even tell if above a bit. The Sureride is other option. Lower ride, less blind spot but second row behind driver does not really matter much. And it does not have the FF technology of Foonf, for what it is worth. Normally 3 YO rides in it, ff. Moved him to Graco Extend RF for trip. Signature oudated. 6 kids. 7, 9 and 10 yo in low back. All 57 to 58 inches. 12 year old seatbelt.