My biggest gripe with MotionPlus aiming is that it takes a lot of movement to cover my whole screen (32" widescreen HDTV). The cursor feels like it's rubberbanded to the center of the screen or something.
Constantly having to center the cursor is kind of annoying, too. I think they should have used the MotionPlus and sensor bar in tandem to automatically calibrate it (or at least made it an option).
Aside from that...wow. The motion controls are fantastic. Flying is virtually effortless, and I actually feel like I'm wielding a sword during battle. Nintendo really should have included this technology from the get-go, even if it would have raised the price somewhat.
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