I'm very attracted to the Promaster as a combo work and travel van. Reliability and conversion ideas would be great. And how this compares with something like the Mercedes diesel sprinter would be good to know (ie, worth all the extra money?).
If you mean "Is a Sprinter really worth all that extra money?" Well, many people here are former Sprinter owners (including myself) and I don’t know of one that would ever consider exchanging their Promaster for a Sprinter or a pig-nose Transit. That is a value judgement only you can personally make, however.