Very poor. The chop cup is heavier and bigger than the other 2 cups. It also stays in better condition than the other two, which in performance looks terrible because the audience sees two dirty cups and 1 clean??
Also the three cups do not stack well at all. They wobble and are not aligned. One last thing, being a bit picky on this one but the instructions included, were written for aluminum cups, which shows that the producers are cheap. This is all Uday's fault, not penguin's, I think penguin should contact Uday and discuss it. I got a refund for them and now have the penguin cups which are excellent but I had to use my money to send them back. I would have been handier if they just told me to keep them, because I presume they won't even be selling them. Do not buy

I love the brass quality for this price !
The gimmicked cup adds a lot for me. I do a classical cups and balls routine but using two times the gimmick.

The cups and balls were what I was looking for: metal chop cup with 2 others. I've performed with them numerous times and they work fine.
What's not perfect? They aren't all the same. The chop cup is taller than the other 2, has lost its shine much faster than the other 2, but is tougher and undented, whereas the other 2, which are still shiny, have small dents (which don't affect the performance). Maybe I have to spend $200 to avoid the problems in this paragraph, but I'm happy with the price and no one has complained about what I just mentioned.