I have Ultimarc's Mag Stick Plus, and I have been very happy with it. I was a little confused on how to get it to switch at first, but once I did it ended up being cake.
It has a short throw, which I like. I have the bat handles, which come standard. I haven't had any problems and have been very please. I also got their 2.25 inch trackball, buttons, Ipac and OptPac, and like all of them.
The Mag Stick Plus also has the advantage of no buttons or switches on your control panel and doesn't take up a lot of space. I have a cocktail, so space is very tight. The GGG switchable plays nice, as others have said, but it takes up more room and has a switch that is visable on the control panel.