Fuel - not very good - get 25mpg on my daily run to work - town > 50mph road > motorway > 40mph road - approx 19 miles each way.
Bringing it back from Southend to Blackpool - got 29mg at a stead 70mph.
But it cost me next to nothing an imo it's worth paying the fuel prices to waft around in absolute comfort
Reliability - nothing has gone wrong so far (touch wood). Air con isn't as cold as it should be, despite a regassing but it's adequate - everything else (and I mean EVERYTHING) works on the car A1 as it should.
I'd have another one at the drop of a hat.