I have not purchased glasses here, but I did stop by on Monday to get my current pair of glasses adjusted. I went in and was faced with a sign in sheet with no pen to sign in. Well fine, I don't like signing in anyway and I'm not technically a customer. All the shop attendants were with clients, so I stood around rather listlessly until one freed up. The wait was about 5 minutes and I'm impatient so I found that annoying.
When my turn opened up my eye specialist was very amiable, took me back to the adjustment area and went straight to work tightening up the loose spots and checking the glasses on my face a number of times. There were no questions about where I bought the glasses and they happily provided the service free of charge.