I bought the shortboard for my 150 and soon returned it. While it seemed to work SOME, for the $199.00 I expected it to work seamlessly, which it does not. See some of the responses above for verification of this.
Now with the iPhone app completely unuseable, I'm seriously questioning why I ever bought the 150. Without the floor control (that was promised would work in the initial ads for Amplifi) it's almost useless live. Since my 30 days have passed, I'm stuck with this now.