i got mine the other day and used it on a journey to the london bike show, worked well, except it could do with something behind it. i found when i pushed the buttons i was pushing my soft gloved finger onto the control with was just pushing into my padded jacket sleeve. i'm going to try putting something behind it, a small piece of hardboard/thin MDF or plastic so i can push the buttons a little easier.
other than that it was a lot easier than trying to undo my jacket everytime i stop to turn the ipod on or off.
now i just need some decent headphones that'll cut some of the wind noise out!!