I have the Minigrip from Ultimarc (my cabinet only got up and running recently so I don't have a ton of time logged on it). I don't have a spinner so I haven't used it for Tron. I have used it for Assault, Smash TV and Karate Champ. I haven't programmed any of the flight games to use it yet but I will soon.
A few thoughts on it:
Out of the box it was so stiff it was honestly hard to get it to trip the switches. Direction down was the worst offender and I actually found it hard to pull down while still firing the stick. I cut off a bit of the spring and that helped a lot. I might even trim off a little bit more.
My primary sticks are Happ Competitions (Street Fighter sticks). The throw on the mini grip is shorter than on the competition with a bit more resistance, so for two joystick games it has felt a bit odd to me at times but I've gotten used to it after a couple of weeks.
I really like the buttons, they both have a good feel to me.
For Karate Champ and Assault the stick does really, really well and I like it.
For Smash TV it is OK but not great. Smash TV is a fast game that makes you want to flow from direction to direction quickly. I find that this stick is a bit too stiff to do that really well. It is playable, but when I use dual competitions instead it works a lot better for this game.
As I said, I may trim off more of the spring but I worry that I'll make it too loose.