Yes, Ive got one. Does increase your peripheral vision, but you still cant see whats directly behind you as your bodys still in the way, hence I am now trialling a rear view camera. One other thing i noticed with the riderscan is that the traffic appears very suddenly in the mirror due to the shape, in a split second almost. You can check the mirror, start to manoeuvre, and suddenly theres something there. So, in fact, you still must "lifesaver" check. Useful, but not a significant improvement on standard mirrors and lifesaver.