The mount is good looking and firm. It is easy to use ad worked with all my three instruments (bass, electric and acoustic guitars).
The wall anchors that came with the mount were unusable, but I think everyone have some in their house so, no big deal.
On the electric guitar, that is the instrument I use the most, the clamp left a black mark, probably because I move it a lot. I don't really care about aesthetic, but if you care you better consider a more expensive product that can guarantee a better "respect" for your instrument.