My reason for using this product is that they focus on the stim part of a pre-workout. I am not a believer of all this arginine/pump stuff. I feel I get a great pump from stimulants in general...not from the "pump" ingredients, but from the actual stims in the product. I love their cherry flavor, and the peach is even better. I guess I like it the most because it's not too sweet. It tastes just right. Much better tasting than any other pre-workout supplements that I have tried recently. It mixes very easily. I have mixed it up in aand even a cup...blended easily in both.
I get a ton of enery from this using . I have to drive to gym after work late evening and it's on the way home, but still about an hour drive. I work pretty far from home/gym. I take it down about 15-30min before I arrive at the gym. It's not jittery energy...but solid energy. This product has in it, but that's not a big reason I take it. I am only taking this supplement 3-4 days per week, and I am taking other supplements, I cannot tell if this caused any muscle gain specifically. Plus I didn't take a blood test, so I can't review this area. For what it gives you, the amount of servings, and the taste, the price is excellent. I bought it from another site for about $23.
Recommendation: Try it, especially if you are looking for energy and not a "pump" supplement