I've use the flat speaker wire before for one of my Qs8s. The wall it is on has no studs but a foam poured foundation so I could not run the wire in the walls for about 5 ft. For some reason I had a little problem with it sticking to the drywall, once I textured over it the weight of it started to fall off the wall. I had to spray a little 3M Super 77 spray adhesive to get it to stay, then once dried painted over it..For years now it has stayed on the wall fine.
I suppose it depends on your textured ceiling and what kind of paint is on it, if it sticks fine.
My problem is that I am switching to Atmos direct speakers which will be mounted lower, so I need to figure out how to splice in some more of the flat tape at a 90deg angle down another 4 ft from where my Qs is mounted.
