Growlers has a decent selection of craft beers and is a solid joint to grab a drink.
Unfortunately, I have had issues with the service both times I have been here. Both times the bar seemed rather understaffed, with only one waitress/bartender on duty the last time I went. We sat at the bar and didn't receive service for about 10 minutes because the only woman working was serving those in the food area. During my previous visit, we waited even longer and repeatedly had to flag a waiter down to ask for water, the check, etc.
After two bad service experiences, I probably won't come back to Growlers. There are plenty of other options in Charlotte for a good craft beer.