Just received this light set a few days ago and have now used them on my first ride. The lights come with a plastic clip which means they can easily be taken off the mounting. The mounting itself can be removed and changed to another bike thanks to the silicon straps. The straps and mountings can be bought separately. The front light can easily be adjusted for height whilst riding and the beam does not vibrate or move when riding on bumpy roads. The silicon strap also allows you to move the beam and dazzle motorist who don't dip their main beams.
There is no switch on the lamp, they are switched on by simply tightening up the head. The 2012 version had been stiffened to avoid changing mode whilst moving along. The mode change is achieved by twisting the head several times on and off, a very hit or miss affair. I have also had the problem of tightening the head enough to turn the lamp on then being unable to loosen it again to switch off. Had to use pipe wrenches! I mention all this as quite a shortcoming which means the lights cannot be switched off or on or modes changes while riding. The lights would have 5 stars if it wasn't for this.
However for such a small set of lights at a reasonable price I still recommend them. The illumination ahead from the Flash front light is excellent and sufficient to ride on unlit roads and lanes. The back light is of equal brightness and would probably be visible from space! I'd recommend buying the set with the Exposure charger and rechargeable batteries. The disposable battery will NOT have the same brightness. Look hard and the whole set can be found for similar money to this.