I've tried out a couple of other brands of energy gels before these, and these are my favourite by quite some considerably margin. They are easy to use (I know that sounds daft but 2hrs into a long run you don't want to be faffing around struggling to open the thing!), haven't made my stomach cramp up and they almost taste good too! Although not cheap (I think they're about twice the price per gram of carbohydrate compared with the equivalent "Go-Fuel" powder), they are very convenient and if you're doing a race with water provided at checkpoints, it'd be a lot easier using these than trying to make up drink from powder.