What bothers me personally is the way that these (and other products with the same claim) to sell itself as a "gel", as such also come out of the tube, but then it transformed the face in a foam-like mass. Although this is a nice effect, but the result is the same as during normal shaving. There were a few years back (have not seen it lately) a proper shaving of Wilkinson which has retained its gel state in the face. This I find very convenient as you while shaving so always has a real visual inspection. Especially if you have a few turbulences which not equal can disappear at the first line this is very helpful. If foam appears, how it happens when HydraGel, this is unfortunately not possible.
Finally: Who wants to try the product once does not make mistakes, who does not even miss anything.