If I'm not wrong, Ultimarc's E-stick is the same as Happs's (and Industrias Lorenzo) Universal Joystick. It's a very good joystick, similar to the PSM30 but with round motion of the stick (you don't feel the corners). The spring is not so strong as the psm30, but the throw is quite as short. It's very easy to mount because you don't have to use screws. The plate of this stick is on top of the surface of the panel unlike the rest of the sticks. You have to use a kind of big plastic nut to tighten the stick to the table. Some people don't like the aesthetic of the plate on the table, but I don't think so. The problem is that the part that goes beneath the table takes too much height. Overall I find it a very good stick, much more to my liking than Happs Supers or Competitions.