I tryed a few of these awhile back and thought they were pretty good. The very first time I tryed one of these I could still feel the energy late into the night. I was pretty happy with the engery it gave me the first time I tryed one and was really looking forward to drinking another one my next workout. The next few times I drank one of these I never felt as much engery off them like I did the first time I tryed one. I still got some good engery off it and it did help me get through my workout. I thought the taste of these were pretty good. I do think they are a little pricey for what you get and would usually only get them when they were marked down at GNC
. For some good energy I think these are worth a try.