I use one of these for 4+ months and it doesn?t show any signs of deterioration (yet even some cheapest pots can survive that long, so it?s not a clear sign). It works smoothly without any wobbling or scratchy noises. It?s a decent thing for it?s price, but you can get functionally equal pots somewhat cheaper, so decide for yourself if saving a couple of bucks is worth it.
For a guitar with a thin body or for an audio device in a tight casing you would probably prefer smaller pots.