I almost ordered a 660 from qtan with clears, but I didn't like the function layer. Personally, if I am to have the page and home/edn buttons on a function layer, I'd much rather them to be mapped to the arrow keys. Makes more sense to me, and easily accessable, than some letter random keys. But then again, I am a big user of those keys, so that I one reason why I stick with a full size board almost all of the time.