Having seen reviews, the current ones have pillarless outward opening doors, which makes them easy to get into. If you get the 5 seat version they're spacious alright but don't try squeezing 3 adults in the back, it's awfully tight, it's much better with two adults. The CDTI ECOflex stop-start versions have good economy and are nice to drive, one thing NOT to do is get the big alloy wheels, they dent the ride quality and spoil it terribly. They have a decent bootspace and the rear seats fold for good versatility and practicality. A good choice if you don't want a big 7-seat MPV.
We did go to the showroom earlier, so got a good feel for the inside of the car. There's easily enough space in the back for 2 adults over 6ft, but i see what you mean with the fifth person, the middle seat is small. The doors were interesting, i believe they're called 'suicide' doors (no idea why) they are different but i quite liked them.
Obviously we'll be test-driving it before making a decision, and we're going to look at various other cars in the next 2 days including the Toyota Verso and the Ford C-Max, so we'll be able to compare them all.
Toyota Verso 7 seater is a nice compact 7-seater but the third row is only really for kids with limited legroom, that aside, if you don't intend using all 7 seats, there is a useful boot to be utilized with third row folded and it's even better with all 5 seats folded. Ford C-Max can easy take 5 adults as it has 3 individual rear seats that move forward and backward to tailor bootspace and legroom to your desires plus folded flat to carry big loads, Ford Grand C-Max is bigger BUT again the third row is only really suitable for children (a lot of compact 7-seater MPV's suffer this trait;the third row tends to be kiddie seats really, adults on a long journey will find it painful back there).
We don't need the 7 seats really, but the additional boot capacity that comes with them would be useful. We did look at the new Zafira at the Vauxhall dealers as well, we found that too large tbh, it was colossal! Reckon it'd be a pain driving round town.
The Meriva we can get for a superb price atm, so we could get that and a trailer, and still be paying much less than a car with a larger boot (eg Zafira)