I've got one, and I like it very much. (I got it from Brion Toss, the rigger, and instead of the wingnut on the end, it has a custom machined handle/nut that is a bit easier on the hands. One really good thing is that the tightened wire seems much less vulnerable to corrosion and failure than the normal clamps. But there are two disadvantages compared to normal hose clamps.
For one, you need a fair amount of space to flip the tool about 180 degrees around the hose when finishing the clamp, and I've not been able to use it in some crowded spaces.
The other being that once "tightened" it is done, and has to be cut off and replaced if you need it tighter, perhaps because it leaks 'just a little bit'. Same if you want to disconnect something for service regularly.