Captain Rawles,
In response to the excellent article regarding hidden wall caches I have some feedback. I work in the tiling industry for an unnamed mid-south distributor. As a distributor for Schluter Systems I have sold many of this kit for installers / homeowners to use for concealed access panels. Schluter Rema is the trade name. They come in quite handy for whirlpool tubs wherein access is required for frequent pump maintenance.
I have sold many of these and have had no complaints. Best wishes, – Matt in Ohio