Few things that wer a bit annoying, but for the price they did what I was after. I've listed the issues I had because they might effect people decisions. The good things were just what you would expect from a pot.
Resistance wasnt quite 500 but it was close enough.
I had a little trouble getting solder sticking to the top of the pot for the ground connection but the soldering iron I was using wasn't great so it could have been that.
I also had some trouble getting the little metal tab off so I just left them on, would have prefered to have them off but not the end of the world.
These were the same size as the alpha pots I was replacing.
I had replaced old pot on my guitar since it started to generate noise when used. I do use my volume on my guitar a lot to clean up my overdriven sound. I think it`s nearly two years since i bought it and it is still working perfectly and turns smooth enough.