I am a big fan of this stuff. Love it mostly because it isn't overly sweet and I can pack several packets in my seat bag without any problem. It dissolves very easily with just a few shakes of the water bottle. Since it isn't too sweet, it doesn't get totally nasty when it gets warm like gatorade. Another plus is our local QFC carries it so I don't have to go out of my way to buy it. I used it on the one day double century ride we did in July which was very hot and it worked really well. I do take extra electrolyte tablets with it though.