i am using this fabulous adapter since many years with a Ghox spinner ( with up and down switch embedded) and it works great with a lot of games.
All games which have L and R control works great but if you have a ghox spinner you can play with games that have up/down controls only to select certain modes such as Pop'Pop
Only thing is that with some games the faster you spin, the slower it moves but if you have a 4 gear taito spinner it is not a big problem
In my opinion the games which totally improves the experience are trash rally, puzzle bobble thunder and lighting 1 and 2 and play girls ( these are really bullshit with a joystick)
In addition you can play puzz loop without having to change option to knob and finding the pinout of the custom connector, or block block with joystick romset