I currently have the mirrors you asked about.
These mirrors are probably the single most thing about this coach that I hate. I get in a bad mood just walking past it on the pad. The strange looks and finger pointing you get from other campers is worth taking pictures of, which I do regularly.
They are undoubtedly the worst mirrors I have ever seen. They sit right in the curved corner of the windshield so anything you might accidentally see is very distorted. They sit so high that the windshield tint obscures what view you do have. In addition to being worthless, they make noise at any speed above 50mph. I have tightened and adjusted and still they vibrate.
I would add the Velvac mirrors if:
(1) I could afford them, and
(2) I could figure out what to do with the hangdown mirrors.
My DW already says it looks like the Hulk with his arms hanging down. I have added side view cameras that helps the problem more than the additional mirrors would I think. Hacking into the rear monitor feed and switching the cameras is a challenge unless you do that sort of stuff, which I do.