Do a search for "Zastava M88" and on its larger brother "Zastava M70A" on thefiringline.com and on thehighroad.org You will find a handful of recent threads.
The sights seem to be their weakness with some being installed off-center and some being loose. I have the M70A & a friend has the M88. Our round counts aren't high yet (+/-500 rounds in each), but being an all steel military design, I expect them to hold up well. Fit is good on both; finish - especially internal milled surfaces- are a little rough. Mine needed the front sight drifted to center. And I get some slide bite from the M88 with my meaty hands. And although the SA trigger is fairly crisp, it is stout being in the 8# range. My friend doesn't like it at all since he prefers SA match triggers in the 2-3# range.