I have only bought one tank from them(myfirst tank)and all was good...There was free shipping and the price was good(I bought a KV-1 with metal upgrades)...I may have been one of the lucky ones I don't know but my point is this...I have always found in dealing with companies big and small that the best thing to do if you can(I understand dmon that you can't) is to call instead of email...in most cases you can talk to an actual person and it helps get things solved...now I haven't had to deal with raidentech customer service yet so I don't know how it is...I just wanted to get my 2 cents worth in...I will say this though the online chat is bad and they don't know what they are talking about becauseI asked if they had free shipping and I was told they didn't...turns out they did...</p>