This is the 4th Nautilus we have bought-2 for our vehicles for our 2 & 5 yr old, 2 for the grandparents vehicle. They are great. The only downside is that the crotch buckle is kinda tight in that sensitive area & we already have it let out to the max. Willing to sacrifice that minor detail for the safety & other comforts. Wish I would've bought this seat right after my kids outgrew their newborn seats-would've saved us some money & them some comfort.