Rhodiola?

I just started taking Rhodiola, and I was wondering if anyone else has used it/is using it, and what it's done for them. I didn't start taking it for weight loss, but instead mood support. The more reading I do about it, the more I feel like it might help with weight loss as well, but I was wondering if anyone had ANY kind of success with it at all (mood, weight loss, etc). I purchased mine from GNC, but I'm not sure if it's really the best source. If you're using it/have used it, and found a really effective brand, that info would be helpful too. ...thanks!