I had something similar to the Honl system for a grid modifier, but I found the speed strap annoying as it’d slip off. But the real Honl may not do that (I don’t know if it has a rubber coating or something), plus the grid modifier puts a lot more torque on the strap than a gel does.
That said, I eventually grew tired of using those Roscoe sample gels so I bought some Velcro tape and full sheets of basic gel colors. For $5 I had enough Velcro tape for 4 flashes (with tape to spare) and I probably made 20 or so gels. It was so much better than dealing with those little sample gels with the hole punch. Plus I can put my grid modifier on it, and I made a couple of snoots out of a soft plastic sheeting and put Velcro on it to keep it secure.
If you use a lot of colors then that Honl pack would probably be cheaper, but I mostly just use CTO and a bit of window green. If I want funky colors I just use the little samples. You also have to be willing to put sticky Velcro tape on your flash. Personally I didn’t really care, but I know people who would curl into fetal position from just thought of it.