Good lighting so you can tell what fabric blends and is not even blue when you get it home it is purple.
Big classrooms or at least big enough so you aren't bumping elbows.
Samples and kits at a price that is the same as if you would pick out the fabric yourself. I don't like kits that are priced higher than what the original fabric is.
Lots of quick projects. I like to fit them in between big ones and many shops don't have quick projects.