If I was to be critical, dental things are health orientated, as well as cosmetic
When people read "SimpleDentals.com", the impression can be then seen as a "simple health job, or a simple cosmetic job"...as a customer I don't like reading the word "simple", I don't want simple. I want professional (pro), quality, premium, great, top...especially when it comes to my health / cosmetics..."simple" will not cut it
Due to that very word "simple", specifically in this sector, I don't like the domain, and consider it low value. Sorry