Got mine today, not sure but seems a bit slower then my GCWZero!!
Tested SMS Plus but all i get is a black screen but can hear sound, Sound sounds like its running really slow, pressing Power button i think brings up the emu menu but again its just a black screen but if i d-pad up once then press A it does quit.
Also PCSX4ALL has an odd problem with Right Analog Stick for me, The game Aliens Resurrection (Dualshock controls) is turning the player Left/Right with up and down on the stick and left/right is doing nothing at all?, Also on same game the Rumble on the unit does not stop while playing, possible to turn Rumble off?
Also frame rate is slower then the PCSX4ALL that came with my RG350 but that version does not use the analog sticks at all and also no Rumble.
And one last question, will you port Divi-Dead to the RG350 as i still waiting for RS-07/PAP K3 Plus version
Update: Arnold (GX4000) Works but has no sound, tested with 5 games if that matters.