I received this product today. I can already say it is top quality as much as possible. Build quality and functionality is top notch. Most importantly, all buttons respond very fast and feels like real time, 0 lag. This is basically PC consolizer or at least that's how I would call it. This is exactly what I needed for many years. Easily 10/10
I'm using IBM Thinkpad T23. I must say the internal keyboard cannot program the controller buttons at all. However an external PS2 keyboard can program controllers perfectly fine. All games work and respond in DOS and Windows mode
NOTE: if you are using an IBM Thinkpad T20/T21/T22/T23 (or a similar Thinkpad from that time period) then you must buy a PS/2 splitter or build your own adapter to redirect PS/2 signals to alternate pins. Otherwise Volo gamepad adapter or any external PS2 keyboard in that matter will not work
Surprisingly, it even works with PC-98! (using a handmade GKA-AT98 converter) Not to mention I can't see any lag at all. It works just as fast as on a regular PC. No one expected this to work on a different hardware so this is an enormous bonus for me. Now this is shocking and this is where you start to see the quality of this thing:
Hell, why even stop there? It even works on Epson PC-98 clone!