I'm surprised there hasn't been a thread about this yet. I'm told they opened last Wednesday, and I went last night. It's on Pico, next to Starbucks, across from the Landmark. I'm not a huge fan of yogurt, though I admit it was kind of fun waiting in line at the Pinkberry in West Hollywood when it first opened. The whole fro-yo craze/war seems a little silly to me. Anyway, the yogurt at Red Mango is quite good. It's decidedly sweeter and creamer than Pinkberry. Their literature boasts that Red Mango is made of real yogurt. Though I enjoyed it overall, I left disappointed. I was hoping they would try to differentiate themselves from Pinkberry. Unfortunately, it felt like yet another carbon copy* of pinkberry with similar decor, similar toppings, same flavors, etc. With so many competitors offering nearly identical product, the market just doesn't seem sustainable.
*I use the term loosely, as I'm not sure who copied who. As I understand it, Red Mango actually came before Pink Berry.