Saw this thing for $21 shipped on Amazon and had to check it out. Surprisingly decent little handheld! The buttons ( except for L/R) feel great and are responsive. Inside is an ATJ2279b, which runs at 450-600 mhz apparenty.
The super cool features are HDMI out, and physical/wireless controller inputs for 2 player. It has a nice big 5.1 TFT.
It runs GBA, Genesis,NES, GB/GBC, NEOGEO, and CPS1 well. It runs SNES and PSX poorly, parappa the rapper runs almost PERFECT though. The battery is junk at 1500 mah, I've ordered a 2300 mah to replace it.
If anyone else has one, comment in thread, I would love to compare/contrast versions f emulators, and hopefully move toward some sort of custom firmware. I feel the ATJ2279b is fairly close in performance to the JZ4760,and those are everywhere.
I'd also love to hear from anyone with a X19 plus, like to hear how well one of those work out.