I have a 75B that was imported by Magnum Research with 2 - ten round magazines. Right after I bought it used, CZ USA had a timely sale on 16 round mags and I got 6 of them.
Mine was unreliable until I removed and cleaned the extractor; it runs like a top now. It shoots soft and fits my hands perfectly, but is huge and heavy to carry compared to a G19.
I lusted after one for years, but my interest in the platform waned after I owned it.
Andy