I used this product for the first time in Ironman Arizona marathon. Initially I had a hard time getting liquid to squirt out but figured out that I had to hold it at a specific angle to get a drink. Also seemed a bit heavy initially but got used to it very quickly. I really liked the fact that I could carry my own mixture versus what was handed out in the race. I was able to bypass a lot of the aide stations. Very happy with the product.
