Are there "good" clip on mirrors?

Although I haven't used them yet on an actual trip, I opted for the McKesh mirrors (Hensley Mfg)and put them on my truck just to look, and they look like they'll fill the bill. I really like that they can extend pretty far out and have optional convex mirrors to go beside.

I was actually thinking of combining this with installation of a camera in the back of the trailer to be able to see all the way around. I don't really need it for backing up (although it would probably help) but I especially want to see traffic behind me.