I was directed towards this site for Dingoo support, and am looking to buy one from dingoo-digital-usa.

A few questions about the general unit:

Is the build quality good, is it fragile and easy to break?

I've seen a few units with D-Pad abnormalities and things like misplaced buttons (especial L/R) Are these just freak accidents?

How can I make sure I don't get an 'HK' model?

I'm wanting to emulate certain games, such as AVP, Marvel super heroes, various CPS2 fighting games, and mainly GBA and NES. How are those emulators? Are the others any good?

Does every emulator come pr-installed or is it just GBA and NEO-Geo?

How good are the 3D games? Does theming require cutomfirmware, and if so, does said firmware have the Y+B button fix? Is it easy to install? I want to avoid Dingux, if possible, I hate having to dual-boot stuff.