I used NoChex back in 2005 and remember the business practices were very questionable. I forgot they existed after and after seeing these reviews I'm glad I stopped. I forgot all about that bad experience as a genuine merchant.
On their web site they do a price comparison which is also wrong. They don't include other providers who are so much cheaper. Very deceptive price comparison. Don't do a price comparison if you don't include genuine competition.
Genuine merchants should avoid them. As for buyers, from I've read, run if you see nochex as an only payment option.