I’ve been using e-Gel exclusively and will not go with anything else. The customer service has been great and the product very successful. I just completed training with e-Gell and running the California International Marathon with e-Gel. I ran a PR by 13+ minutes (my last PR was a year ago with e-Gel as my fuel also). I qualified for Boston with a 3:18:16 and felt great. One e-Gel 15 minutes before the race and one at miles 6, 12, 18, and 23 mile marks and then the last three miles were my fasted splits. I promote it to all of my friends and love the product.