Spent more time with the RBG and almost all CPS and CPS-dash games work (I think I found a couple broken), not so wrt CPS-2.
For the CPS-2 the only fighters among the Street Fighters, Xmen, Marvel, DarkStalker and Vampire Savior that do work are SSF2 and SFA (that's it), the rest do not work, Megaman and Megaman 2 works (they are 1on1 fighters).
I'd say around half (likely less) of the CPS-2 library works (19XX works but not 1944, DD-TOD works but not DD-SOM etc...etc....).
Wrt CPS (1-2) emulation in general it is what it is, stuttering, not exactly in sync etc.... a likely sign that the HW can't keep up with whatever emu they are using. Pulling Hadouken in SSF2 is harder than it should, not so bad in SFA Normal mode (haven't tried Turbo), the initial background of Super Puzzle Fighters 2 Turbo shows stuttering in all of its glory.
Wrt to CPS 2 games there are 4 categories:
1) loads and works
2) loads partially and throws "Invalid format" (but you get back in the menu, around 1/2 the library fits here)
3) loads partially and locks (need to reboot the thing, it literally locks at the animated loading icon)
4) loads and starts to a black screen (need to reboot the thing)
There's like 4 or 5 each for the last 2 categories, unfortunate if you ask me as it means the emulator is not that good if it locks up on load or on start. I also had 1 separate case in which I was playing, managed to get back to menu (START+MODE during play) and got locked there ... buggy!!!
It's been entertaining to look at some of those CPS (1-2) games that I've never heard of, other than that emulation and/or HW needs to step up for this product to be any interesting.