any office looks state of the art to someone who does not know what to look for. just because it had tile and the AC sounded high tech and the ceiling is made out of something other than fiber glass squares does not mean anything. only the techniques and size of the blads and type of stiches matters. and the use of computer screans for magnification when seeing the donor strip.
4000 in one day is a huge amount. Everyone I heard of had a hotel stay and 2-3 day procedure when they did that much.
You have to ask how many "grafts" are put into your scalp at a time, since blug doctors call individual hairs grafts, even though the actual thing getting put in your scalp has 10-25 hairs in it. Make sure the doctor take follicular units of 1-3 hairs that are naturally together in groups and puts those individual 1-3 hair groups into small 1mm slits, with different sized blades for different sized groups.
Do not do slot grafts, blugs, mini grafts, or a list of other synonyms gilator can list here.
i repeat, many plug doctors will take 100 hairs on a strip, cut it into 10 pieces of 10 hairs each, put that in your scalp, and say they gave you 100 grafts, when they only gave you 100 hairs and 10 actual grafts. you have to ask the right questions so they can't slip out of them.