I've got a "new" shape one. It's from 2007, 106k on the clock. 2.0 HDI. With GrippaMax 650, and everything accompanying it I get 29 MPG (probably would do even better if wheel bearings would be replaced all around.)
Drives superbly well, in fact it drives better fully loaded. Plenty of power, plenty of torque, especially going uphill. Pleasant to be in as well. Galvanized chassis, so no rust. AFAIK Ford and Merc vans still don't have that.
Ps. get the 2.0. The 1.6 had some turbo problems, not sure if they have fixed that in the newer ones.