personally, i love the diagonal restrictor. if you take a happ super stick, you can flip the actuator over so that it works in 4 way mode by only being able to physically press one switch at a time, without restricting movement...however it just doesnt feel very good at all. I have an ultimarc U360 in my main mame cab that has no restrictor, and it works beautifully in 4way mode..i have not ever had any kind of performance problems with this stick. however i have a DK cab that i am running mame with vertical 4way classics, and i have a Sanwa JLW ball top set to 4way mode with the restrictor plate. (same stick as the ultimarc jstik) and it is amazing...it feels wonderful and I can't imagine playing 4way games with any other stick..from pacman to donkey kong, it is perfect