I use the Hammer Gel Apple Cinamon flavor. It doesn't seem to taste as sweet as the chocolate flavor, which is thicker, too (my husband uses that one - I'm not overly fond of sweets). I used to use Gu when I did endurance riding with my horses. I never could tell if it helped or not, however, it was the horse doing the harder part of the work not me. I can tell a big difference with the Hammer Gel. I think it helps me quite a bit, especially if I am losing energy. (It could be a mental kick as much as physical though)