I just bought one from this guy on ebay. Can't give my actual opinion of his product since I haven't recieved mine yet.
Georgeortiz on this board recently bought one from him though and has been pleased with it, he recommended them to me. I believe he said he tested his water after running through the system and it read a 1 on his TDS meter. Not a bad system for $94.50 shipped if you buy it with buy it now.

http://cgi.ebay.com/ws/eBayISAPI.dll...category=46310