My dad used to have a double cab, a Vauxhall Brava. When he first got it we used to play "spot the double cab" as there were none around, he got rid of it in 2003 after a few years after he retired from building work. It was quite slow and could barely hit 60 on uphill stretches of motorways but took all his work rubbish around and took my family all over europe camping (way too many memories of bringing big rocks, and at one point a grand father clock). It was very agricultural but nice.
He replaced it with an X-Trail, still plenty of space and some grunt to pull trailers when needed.
I'll probably get one at some point, useful for dirty work (bikes and motorbikes) and lugging trailers if necessary. There do seem to be a huge number of people with them now though. Oh and we did use it off road as well.
Love all the moaning that they struggle to do 90 on a motorway, I thought the speed limit was 70...

And less space than an estate? Really? I'd check again if I were you...