F4 for widgets is brilliant. Just the right finger for the Dashboard. I programmed F5 and F6 for the other Expose functions even though my logitech VX Revolution takes care of those quicker.
It is faster to type on. Easier on the the carpal tunnels and quieter. It feels pukka (hit F4 and look it up). After a couple weeks, the one thing that keeps getting me is replacing my fingers on the right keys when I momentarily take my hands from the keyboard. Instead of my index fingers on the F & J, they sometimes end up on the D & H or G & K. The little nodules for correct hand placement are tiny and at the very edges of the F & J.
I’d give this thing an 11 out of 10 if it had blue LED lights under the keys like the MacBook Pros.