A friend mentioned Red Mango as a probiotic all-natural yogurt place that offered a plain unflavored option so I was really excited to try it, because:
1) I love probiotics (my fave frozen yogurt chain is Yogen Fruz, after all); and
2) I love plain, unflavored organic yogurt (I actually like the sourness!)
All that said - Red Mango was incredibly disappointing. Their natural yogurt is not sour in the good way that typical plain natural yogurt is. Between the absurdly sharp acidity and the unpleasant aftertaste, I would rate it as somewhere between spoiled sour cream and curdled milk. (Is it bad to admit that I've actually tasted both of those things?)
The service didn't help. When we walked in, there was no one behind the counter. We stood there for a few minutes before a girl who had been sitting outside on the patio chatting with a friend came in and asked if she could help us. I was like, "um.... yes?" The instant she finished processing our order, she immediately ran (and I mean that literally) back outside to continue gabbing with her friend.