I got one specifically for when I'm on the bike. It's the only occasion I've had to use it but it fits that purpose very well. My primary riding jacket fits tight around the waist so I really can't use any of my other holsters.
I chose the Miami Classic Lite for a couple of reasons. One, I don't need a fancy molded leather holster for this use, and two, it has a single mag carrier rather than a double. I thought the single would be more comfortable for me and so far that has been accurate. I never carry a third mag under normal circumstances so don't need one while riding either.