I have used these clips on both violin and different size violas with great satisfaction. Great quality you would expect from DPA.
Use: Very easy to mount on the instrument in a few seconds. Can positioned easily with one hand. The mount is very secure due to rubberised clamp. The most important - it will NOT scratch the instrument.
It does not change the sound because it is very light even with the 4099 mic on. It never broke, never fell.