Honestly, I have a couple in my shed for future projects and have previously used one in an "arcade classic" vertical cab sited in the amenities room at my former work.
I love Groovymame, especially for my shmups, but most of that refresh rate goodness and "new car smell" is wasted on "classics" from the late 70's & early 80's. I mean OK Galaga does feel a little different, but nobody will really know. With my machine the security guard liked to play Galaga on it during long lonely nights and he was still able to clock the score counter with no complaints other than the starfield is different to the original (he was right: mame still haven't properly emulated the starfield for Galaga properly, and those multigame PCBs just run an ancient version of mame, maybe advancemame).
It is primitive, I know, but using a multigame PCB I don't have to worry about the computer crashing, video card failing, some unknown error in the latest CRTemudriver to emerge, a Windows weirdness or whatever blahblahblah. Just plug it in and away it goes.