Had one a 650l installed back in March. Has been superb through last year and the back up from the guys in Grimsby in first class. Probably a bit big for what I need at the moment as I only use around 350/400 litres a day
If you can afford it, definately the best, most competitive, professionally fitted van mount system.
All bolted into the floor of the van, full training on any filtration and purification questions.
Steve