I have one and have found it excellent for the last 2 1/2 years so far. No plans to change.
Ours is a 2006 model bought as 2nd owner with 7,500 miles and we are now at 15,500.
We have 1 kid at the moment and she is 6 and sleeps on the top bunk. In the future a new addition will be sleeping on the bottom bunk.
I had to put a warranty claim in for damp on the leading edge of the overcab, this was sorted out by the supplying dealer no problems.
Damp is the main enemy of the CI's of this era, the new ones have a lot better contruction and lot longer warranties.
Everything else has functioning perfectly, no problems and nothing needed. I have the base vehicle serviced and no problems reported at MOT time.
The toilet tank is a standard Thetford model so the capacity will be the same as all the others.
The price looks about right as a starting point for a little negotiation. There is another 2004 model on ebay in Mansfield for £18000 with 25K miles. Private sale of a 2006 model in Devon is £19,500 and that has 27K miles.
Is it a family purchase? We bought ours as we had 1 kid and plan for another so wanted bunk beds for the kids to be in bed and to maximise the amount of space we have to use after 7:30pm.
If its not a family purchase they should look elsewhere as the dinette does not lend itself to evening lounging.
Mine has the 2.3jtd Fiat engine, I have seen others with the 2.0jtd engine which will be underpowered for a van this size so avoid that if it is present or a bigger discount will be needed.
Ok so after writing this i have looked up the van
It does have the 2.0l engine, this pokes out 85bhp or something so it is quite far down on the 110bhp of mine.
It might be ok on the test drive empty but when loaded up I think it will be too slow. More economic on fuel though.
Its got a Fiamma windout awning like ours which is always nice and pricey when new, I see its got a top box for more storage as well. I hate getting up the roof of ours once a year to clean it so I don't know how much benefit they place on that being there. I wouldn't use one and wouldnt like the extra weight so high up.