I'm using this mounted on a cymbal arm. The mounting system is very good, allowing mounting directly on a cymbal post without any issues (which is a major advantage over the Rhythmtech Ribbon Crasher, which is tricky to mount in the same manner). Build quality seems good, though only time will tell how the black finish of the metal plates stands up to months/years of being hit. Mine did have a few blemishes in the finish fresh out of the packaging, hence I've only marked 4 stars for finish. Sound-wise, it's not quite as trashy and metallic sounding as the Ribbon Crasher, with the tambourine bells being quite dominant in the overall sound. I haven't investigated yet to see how easy it would be to remove these and/or replace them with metal washers for a more clangy sound. Having said that, I like the sound overall. It's pretty loud, so should still cut through in a reasonably loud band environment, but would get a little lost if your bandmates have their amps cranked to 11. Overall, I think it is nicely built, makes a good sound, and is reasonable value for money.
Update: Having used it a while now, I notice that the PAR-100 sheds a lot of small black flakes in use (presumably the finish being rubbed off where the plates rub against each other when hit), which is annoying - especially with a white drum kit. I've knocked a star off from my original rating accordingly.
The Pearl PAR-100 Anarchy Crasher has a nice and biting sound. It really does what I expected it to do soundwise. I chose the Pearl one over the Rhythm Tech crasher because of the position of the mounting system. The RT crasher has the hole in the mounting system directly underneath the metal ribbons which to me looked as if might limit positioning choices in terms of up and down. RT again offers two sizes as far as I know which could be nice developing grooves with two different crasher sounds. The only slightly negative thing about the Pearl crasher is that the two spikes and jingels limit the striking area a little bit. But I think that is not too much of a problem. And I think the price is ok.
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