This product works well. You will not feel a rush of energy, but rather a steady, even level of energy.
In addition, Hammer gel flavors, at least the ones I've tried,orange,tropical and raspberry are not terribly sweet. Lastly, even though this is not important to some, it may be to others, these are vegan products.
Hammer gel has real flavors. It gives me steady energy rather than the sugar spike followed by a crash that I get from some gels. My favorite is raspberry - real fruit and not too sweet. If you want caffeine, the espresso flavor has a lot, along with serious coffee flavor.
A few months ago, Hammer thinned out their gels, making them easier to use. They increased the size of the bottles to keep the same weight of the contents. Since Hammer changed the consistency, the gels flow much better from the little bottles-even in the cold. I really enjoy using the Hammer gel bottles now. Less waste and lower cost than individual gels. Also, I find the gel bottle easier to use than single gel packs- and I don't get the gel all over my fingers.
A good deal if you grab some hammer gel flasks, and can handle refilling your own flasks. There are rumors that if you are on the trails in forest park, you might see a wild eyed man with very short hair downing a whole bottle of the espresso flavor.
I prefer to fuel on whole foods when riding, homemade rice bars etc. When I ride, this gel is in a 5 shot flask in my jersey pocket. Gel packets are sticky trash in my jersey or accidently dropped on the road. I mix flavors fo Hammer Gel in a flask or on their own. Easy to use, dose how you need it. Great for that emergency to avoid the bonk. Not a big fan as using this as only fuel, more of needing a quick blast to get over the next climb or long stretch of fast tempo. I always have a flask in my swim bag or in my jersey, period. I've been a Hammer Gel fan for over 15 years.
I have used Hammer Gel for a long time. It's super simple to use with a Gel Flask and provides instant energy. And, no fussing with a foil packet, getting my fingers sticky, or worrying about disposal. Has saved me from bonking more times than I can count. Highly recommended.
I love Hammer Gel. It has save me (and my wife) from bonking on many rides. I also like the flask system - I find it so much easier to use versus the individual foil packets. And, you don't have to worry about packing the used up sticky packets (or littering with them). Love this product!!