I find these waffles a lot more satisfying than your typical gels (and even most bars), but they are a bit bulky in the jersey pocket. If you're only going to carry one or two, they're a nice change from gels and chews, but if you're doing a long ride, it's hard to carry enough to get the calories needed.
I'd definitely recommend them as a nice option to other products.
I was really surprised by how well these work, and the underlying rationale on the science behind it was discussed in an article in Velo News in the Spring (myths about lactic acid-lactate). I was initially thinking the effectiveness was largely a placebo effect, but after several rides (most hilly) I was impressed both by a sense of having more power-endurance and, more dramatically, far less soreness post ride.
Take 3 pre-ride as per label and try to take one per hour (when hands can safely get free!).
Overall I would at least recommend giving them a try and see what you think. A thumbs-up from me.
By far the best tasting bars I've tried. Filled with good stuff. Very filling - enough for 2 good gobbles. This is what you need when you run out of steam with many miles left to go. It will get you home.