We have one that runs in our shop nonstop for 8 hours a day, 5 days a week and it's about a year old now. We used hem tape and although it works, the seam is starting to separate a bit now. I'm thinking about taking the banner out and redoing the seam.
I don't think these stands are all that popular, because by the time the customer pays for the stand and 12 feet of banner to go round and round they are out about $400, so most people will go for a regular stand in about the $250-300 price range. People will come by all the time and say "Oh, that's nice!", get a quote and either buy a regular stand or don't buy one at all. In the year or better that we've had this one on display, we haven't made one sale yet.