Hello
Firstly we have the 6 seater, so seating arrabgements and folding may be diff. The 6 seater has a better review than the 7 for some reason, but the walk through aisle down the middle is handy with kids.
Mpg is ok, ours is a 1998 version. It's not the best in it's class but it isn't the worst either.
Back row is perfectly fine for adults. The car is pretty roomy actually.
Middle row seats will be diff for you if you want a 7 seater, but ours can come out completely very easily. IF i remember, next time i speak to my sis I will ask her if her shuttle was a 7 seater and ask her about it.
Back row folds down in one unit on our car. It's easy peasy, and folds down flat .
Boot is not huge but deep. We can get ds's wheelchair in no probs, and a bit of shopping around it as well.
Downside is they seem expensive to repair.
We love it though. It's v nippy too, as lots of people find out when they pull up next to us at the lights expecting to jump ahead and burn us off!
Seats are v comfy. Ours are leather, but I don't know if that comes as standard.