Just bought a Cyclo a few weeks back. Have used it a couple of times an simply love it! There is absolutely no vibration. It's easy to maneuver around, lightweight and yet seems to be very well built. The pads are perhaps a little tougher to buy and possibly more expensive (you need 2 of everything) but I've used RO's in the past and wouldn't dream of going away from my Cyclo. The results are great as well (pretty much dummy proof which is a good thing in my case)! No experience with the UDM