My dad had one. He loved it. Real fuel was just over 40 I believe. It was a great car, however....
It ended up being 6months old and in the garage for around 2 months due to the 'Adblue injector sensor wire' snapping straight off. He was given a Disco 4 in the time it was in the garage and subsequently changed the sport for a D4 and he says its the best car he has had and hasnt had any issues with it.
My dad has said though, he would buy another Disco Sport when he wants to down size as it really is a fantastic car.
If you get a good one you wont be disappointed! Just double check on the Lumbar support as iy didnt come standard on the SE Tech we had which was my dads only real critisism.
Also, its great in the mud..