I've never had a problem with JoAnns, although I don't get to go there too often.
I did catch on to putting my coupon on the item I want it used on, from trial & error. ;) I'd say their customer service is 'good enough', since I don't go in with questions.
All the material in the argyle quilt I recently posted was from JoAnns, and not a problem with any of it.
My only issue is I wish they'd get one closer to me! :) :)