Much as I like the sound of the Sprint I do spend 2 hours a day on it, I don't think it hinders my concentration in any way, over 50mph I can't hear it anyway so won't get in the way of normal riding. Around town it is handy sitting at traffic lights or when stuck in normal traffic. I find that if my concentration ever slips it's time to pull up and smell some coffee.

May go off the idea but it's fun for now, don't think I would enforce it on other riders though...