I have 2 Magstick plus's on my CP and I find the switching isn't too tough once you get the hang of it.
My problem is that it feels like the horizontal and verticals are much harder to hit than diagonals. When playing robotron, for example, in normal, mindless gameplay, 90% of my shots are diagonal, and I have to really concentrate on positioning the joystick just so to get it to shoot vertical or horizontal.
Jason