I'm happy with mine, but there's some features I don't really care for:
It has a magazine disconnect... above all, it makes for a PITA while disassembling. On a defensive weapon it would be a bigger deal, on this target gun, it's just an inconvenience. There are some web sites that describe removing it... but I haven't done so as of yet.
The slide stop has a detent to hold it in place. This won't allow you to chamber a round after reloading by slingshotting the slide. Since this is the way I train, I seriously dislike this functionality. I can't find a simple, reliable method of changing this behavior. There's some instructions online to convert it, but they sound like they'd be beyond my basic mechanical abilities.
I understand that they are trying to save money with these molded in grips, but I despise the idea. How much could it possibly cost to put in a couple of screw posts and provide a changeable set of cheap rubber grip pannels? As above, I'm quite unlikely to take a grinding wheel to my new gun, so I guess I'm stuck with these grips.
Aside from these rather annoying items, I like the gun. It's accurate, reliable, handles quite well, and was relatively inexpensive. Even with it's problems, I find myself shooting it more than I do my Browning Buckmark these days.
If I could find a Mk1 or Mk11 22/45 at a reasonable price, I'd be tempted to trade up...