Haven't tried the other two, but loathe scissor switches. There's a lot of variation from one scissor design to another in terms of feel, with the better ones actually being halfway decent (though still not mechanical quality), but even if a scissor keyboard is okay to type on, in my experience, they just don't last. The keys on them are always getting ripped off during normal usage, and the mechanisms always break...either the scissory bits themselves, the part where they attach to the keyboard, or the part where they are being attached to the key.