One small thing I read about the Micromart punch is that it does not have a channel along the bottom for the disc to end up in, but I dont know if thats a big deal.
I have both Waldron sets, very happy with them, but neither cost $100. The larger of the two is about $45. The subminiature set is more though.
I knew it was a bit of a splurge when I bought mine (Roll Models), but now that I have them I find myself scratchbuilding a lot of details that I would not even have thought of if the punch was not on my bench.
George