When I was buying grout, the tile salesmen insisted that if the grout
lines are greater than 1/8" we must use sanded grout. (My grout lines
are irregular and in a few places are indeed greater than 1/8".) My
tile setters, on the other hand, tell me that they never use sanded
grout in a stand-up shower and I would prefer to have unsanded there
What's your opinion on this?