I've had stuff off them in the past and they are generally ok. Just a couple of things though. When they sent the wrong part out, they would not send the right part out until the wrong part was returned at my cost.
Secondly-------AND FEEL MY PAIN here. about a dozen years ago I ordered 3 of the manual safety bars for Bsa Scorpion pistols, as I don't like manual safeties. (Actually I don't like safeties at all). So I stripped a gun down, did a full trigger strip and swapped the safety bar over. It was still automatic! So I repeated it with the same result. I tried all 3 safety bars and they were all automatic.
I phoned up Chambers to tell them and was met by a cheery "Oh we must have put them in the wrong draw" .

You do multiple Scorpiion trigger strips with 3 different safety bars and see how you feel after doing it!

Apart from that generally ok.