FINALLY had a chance to play with this today. Love it love it love it.
Flashed ShadowMonsters "jailbreak" BIOS (eurgh) so can load regular ROMs off of SD (nearly all my physical carts in the loft at mo, though have tested with a few GG I have around). Works really well. Tested a few games, like Golden Axe (MD)... seems flawless. Played Sonic 1 (GG), fucker still gets me in the same pits even 30 years later. Swear I have not had a smile on my face like that since I was 12. Though weird thing, if you playing a GG game on a 60" screen you really need to "re-evaluate" your jumps you would usually do on a 3" screen. LOL, takes some getting used to.
Tested SMS too, but colours all messed up. Suspect thats a PAL/NTSC settings issue I need to check out though (when I have more time).
Man... if anyone has any (now out of stock) Analogue products (like the Super Nt) they now bored off, I'm a new convert who would happily compensate you...