What's not to love about The Beer Growler! They have 40 beers on tap and since they are filling 32 and 64oz growlers... the beers are constantly rotating with new, exciting beers to try. They recently just started doing flights which is pretty genius. Have a flight with whatever beers you are debating about getting and then fill a growler up!
The staff here are super nice and also pretty patient. When you walk in, it's pretty easy to get overwhelmed by the huge chalkboard of beers on tap - their website is updated well... but if you see a beer on the menu that you would want a growler of, I'd say don't hesitate to get it since the kegs here go pretty fast.
I love the idea of just trading out a growler for a fresh, clean, and sanitized one. I think the only thing they ask you to do is leave about an inch or two of water at the bottom of the growler once you are finished with its contents to nothing gets stuck to the bottom and makes it difficult to clean.
Lots of parking... easy in and out from South Blvd. Totally walkable if you live in SouthEnd.