Well I didn't wait - been looking for a decent rear visibility aid, and these sure fit the bill!
I ordered at noon (EST) on Friday, and got the shipping email just one hour later. With the holiday weekend, it arrived via USPS today.
These are quality units, nicely fitted and with thin bezels, plus the mirror itself is glass, not plastic. They have 3M tape to install, and the back is hollow so they'll fit tightly.
Totally two thumbs up. Only one thing - I can't install them due to the weather here! I'll need a dry warm-ish day. But here's a snapshot to admire in the meantime...
BTW, it's pretty much impossible to take a photo of a convex mirror without getting yourself and your phone in the frame!