i had the u360 in my first cab, with hard spring and octagional restrictor. i had round and square as well, and longer shaft.
the stick is great and feels great. but it had this magnet at the bottom of the shaft, if you twist the shaft with your fingersm you see the magnet rotate and not in a smooth movement, it wobles, you can correct this with you fingers trying to make it perfect, but every once in a while after people slammed your stick around, it goes back wobly.
this said, when you turn on your pc, and the magnet is not perfect horizontal, it celebrates the magnet and sensor, making it not perfect.
i get bad gaming results with this.
great idea the u360 but never again for me.. ( i owned 4 sticks)
i hate the clicking sound of regular sticks, thats why i wonder about the p360, how they are.