If you enjoyed playing in the arcade probably you will not like the black sega saturn virtual stick just because it uses microswitch. However, I played Virtual fighter and Street fighter to test it and see any flaws, but I think it is excellent.
1- The rubber contact responds really well and kind of absorbs the movement, so have to go all the way to the direction you want to make the contact, it means you won't execute other direction just because you slightly move the stick in another direction.
2- The concave buttons are good to centralize the finger and press always at the correct place, you won't press wrong anytime.
3- The separated turbo switch and the turbo speed are an extra.
4- The stick is longer than the neo geo and the big ball makes get precision on every move.
5- It is heavier than the Neo Geo`s and the plastic finish fells great, the bottom is a sheet metal.
I really don`t see any bad thing about it. All sega first parties controllers I have are great, third parties not so much.
But this is my opinion and I never played arcade too much, but I always had a sega genesis arcade stick and played a lot of fighting games.