Although Ugee is among the cheaper brands, I can verify that the quality is pretty good for the price I paid (£37.49, or about $49.00). I've used it a lot for a year now and it is just as good as it was when I first bought it -- no scratches or dysfunctional buttons.
Unfortunately, it is a UK company that does not ship to the US. But that is okay because I do not have the money right now anyway.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.