With these devices I can be sure the splice is safe and just move on.
I've read some reviews on the splice kits on other sites. Apparently, they're used quite a bit in the modular home industry, where they are used to join wiring from one module to another.
They also have a pretty high failure rate, based on some of the things I've read in some of these folk's post. I don't know, but does the fact that they're available for use also mean that they are approved for use by the electrical code?
Ditto on the ugly blank plate, but boy, I'd hate to have an electrical issue in a wall that I've tiled over.
This is why I originally started this post. I'll be replacing/running additional wiring, and am passing on the thought of an in-wall junction.
It occurred to me that I never posted the results of the bathroom re-do. I didn't think to take a picture until I had already started pulling wallpaper, but here are some before and after pics. Note the old Hall-Mack rotating mirror/toothbrush holder below the medicine cabinet. Recessed, "contemporary" fixtures were pretty popular when the house was built...