thanks for the recommendations.
no-one has said anything about getting the car seats in and out easily. I guess most people dont need to do this (the reason we do is that hubby has a business he has to use all of his back seat for, but we still need him to transport son on a couple of days a week so it means taking it in and out)
anyone who does have to do this - safety is obviously our top priority but this is followed very closely by convenience!!