Not had a good experience on my '10 but that was with an HM, even had it set up by HM dealer but wasn't happy. Original was better lol. Heard different experiences in the racing paddock, seems the BM is not a suitable candidate for one lol.
I used a HM on my old bike but having now changed to the S1000 I have the option to use the QS functionality of the Bazzaz unit im using just for fuelling right now. Im finding the BMW 'shift assist' a bit sketchy as sometimes its smooth as my old HM was and others there is a very noticeable lag. Ive heard rumours the Bazzaz QS is as good as the HM but never spoken to anyone actually running one! Interesting you found the HM no good though not heard that before.