Make sure you can install a carseat in the middle of these vehicles (check out your owner's manual). Some vehicles will not allow you to install in the middle.
The one thing that concerns me is when you decide to install the
Radian FFing, it has a very low belt path (where you put the seatbelt through to install it), so if your buckles in your vehicle are very long, you might not get a good install (you cannot have the buckle enter the belt path on seats)