I have the Pepetools one as well as a cheapie one. Love the Pepetools one, the cheapie one works fine in my hydraulic press, but I didn't like it when I used a hammer.
If you have a hydraulic press (I have the medium Potter one), then they all seem to work fine. Remember to center the punch on the press platen!!! That is critical.
If you don't have a hydraulic press, then it's important to know that the top part of the Pepetools one can be tightened down to hold your metal in place (I think the Swanstrom one that Rio sells also has that feature, though in a slightly different configuration). The cheapie one that I have does NOT have a tightening feature. You put the metal in and rest the punch on top of it (though the holder).
When I was hammering, I used a 2lb brass head mallet. I'm not the strongest, so I would often have to use two or three blows to get the disk cut. That was ok with the Pepetools one, but in the cheapie, the metal would sometimes move and I would get score marks. (This was even if I had taped down the metal.) YMMV, of course.