Oolong (Wu-Long) Tea

Anyone ever used this stuff?  Stupid diet fad companies claim it helps in weight-loss by what I call carb-blocking. Similar to green tea but supposedly better for weightloss. Wondering if anyone has ever tasted it or knows more about it? I don't expect it to be some thaumaturgic panacea or anything but I am curious. Probably tastes like goat pee, lol!

Isn't oolong basically black tea - the same Lipton crap you can buy at the store?

I like tea, but every time I drink it on an empty stomach, i barf. Not sure if it's the tannic acid or what. 

I'm not sure but everything I've read thus far says it's not black tea. The leaves evidently dry as little black threads so I guess it could be considered black tea by color...