No idea about the actual integrated seats themselves, but I know, in general, there's good points and bad points about integrated seats. When we had the option of using them or not, we didn't use them as a primary seat for one reason only: my luck SUCKS with cars, and if something happened (car broke down in some way and someone needed to come get us), I'd still need a carseat for DD, which meant keeping a spare carseat (or booster, depending on her age) in the trunk if using the integrated seats. Seemed much less convenient when I looked at it from that angle!
--Mimi
Mom to Lala (2004), Bonus Mom to Big Sis 1 (1991) and Big Sis 2 (1992)
Grammy to Big Kindy Kid (2011), Big Pre-K Kid (2012),
Grandbaby Appendage (2014), and New Baby Grandboy (summer 2017)