I use it basically exactly how you describe–as something to pull out during a break for a quick, sanity-preserving respite when mosquito pressure is high.
Most frequently, I would just drape it over myself, usually lightly anchoring the corners with rocks or stakes. It works quite well for that. In this case, your “contact points” with the net (usually head, shoulders, and elbows) need to be clothed in material mosquitoes can’t bit through. Setup time is on the order of 30 seconds.
I found that actually pitching it took too much time and was too much hassle, as others have suggested.
I have used it inside of a Hexamid solo. It’s pretty fiddly to get right, but it works. I prefer just using an UL bivy underneath the Hexamid to pitching something like this (even if I have this along).
+1 to @sbhikes regarding velcro. Velcro will devour one of these.