Wow I never knew there was so much drama regarding tasting cups! I will say I saw a LOT of people abuse the tasting/sampling at Mojo in.Biltmore, which went out of business...
As for my own experiences here, they've been fine. I've seen the cashiers wipe down and clean when they're not busy ringing orders, which I admired. They always have mochi that's not stale, and I am a fan of some of their flavors (the mint was fantastic the one time they had it).
My mother feels this is the best frozen yogurt shop around (she really didn't like Yogurtland or the place that shut down in the mall).
I will say that after several years I still have no idea how to access their "free Wi-Fi," and don't care enough to find out how (I just use my cell network connection).