I looked into purchasing one to try when they first came out as my intial thoughts they looked good. Then thought hang on a mo that is a very expensive way to buy resin (a brand of resin I have never used) as the refills are not that cheap. I also thought for the intial cost of buying decent size vessles was a rippoff too. Needless to say I've never bought any to try but I would say for the outlay and running costs you would be no better of than using normal di vessels and the brand of resin you prefer to use if you ask me.