I bought four of these, and three of them had no problems what so ever, and I'm very happy with the quality of those.
Unfortunately, there was a black sheep.
One of the pots waa bad, and had some (quiet but non the less) bad noises going with the resistance on max (the pot on 0), which the owner of the guitar I was putting it on didn't mind, be sugar he taught it fitted the guitar (which was - badly - relic'ed).
I tried anther pot thought, just to see if it was really the pot, and it was, but, 'cause the guy asked for it, ended up issuing it, and it's still being used.
It's bad that this happened, though.