Every time I'm at Town Square, I hit up Lollicup Cafe. I usually get either Boba Mill Tea or Thai Tea with Boba. Both drinks are quite tasty.
The wait time is definitely a con. Even without a line, it takes awhile to get your drink. If there is a line, expect to be there for awhile. They usually only have one person doing both cash register and making the drinks.
If you don't mind the wait, though, it's definitely worth checking out.