We use them for group social areas on expeditions to avoid midges. So they do work !
We use the TENTIPI Varrie 7 polycotton. Ground sheet fits not tightly but keeps midges out.
They warm up quickly in sun so having the lower vents opens and a bit of roof vent open helps.
I have one of these for similar uses and biking etc. Very cheap and lasted well - no issues - over a year now.