I like them...but...all the Brno ZKK series seem heavy to me for their respective classes and do not handle all that well. Not for me anyway. The triggers, whether single or single-set, are not great and can be difficult to adjust. The safety operates backward. The pop-up peep is admirable machining but not really that useful. Particularly in the later versions, most of the somewhat excessive machining is a bit crude. There are several parts that are actually castings from originally machined parts. The forend "Rosewood" tip on the bulky "Monte Carlo" stock is really just dyed forend wood. The white line is a U-shaped insert, not a real divider. The "classic" stock is way too low for scope use. The wood finish and checkering are crude and benefit from a refinish (like Zastavas). Open sights are crude. Scope mounting can be a pain. There are a lot of parts. Way more than a regular Mauser.
Good barrels. Usually fairly accurate.
In general, they fall into the category of "improved Mauser" and like the others in this category, they are really not much of an improvement at all.