My favorite scissors!
I have the 5.5 and I absolutely love them (bought two pairs so that I don't have to use anything else when they go for sharpening). The double swivel is very comfortable and the click adjustment is by far my favorite to adjust tension. I find that these keep their edge nicely as well. I love the range of movement I can get from the double swivel and I don't think I'll ever go back to using a stationary thumb rest.