Never heard of them.
I know some guys don't like the right side slide release. I do. Just buy a CZ75 (more of them around anyway, especially since CZ stopped making the CZ85's a few years back.)
I like the CZ85 set up enough I've converted two CZ75's to use the CZ85 slide releases. I've actually only seen one (old but in good shape) CZ85 in the last 10 years or so of gun shows in my area. Should have bought that one the first time I saw it but I already had one Pre B CZ85.