I am a developer and I am always in a terminal and using my arrow keys. I got a TKL that had arrow keys for that reason, and then I decided I wanted to try out a Poker II. Now I use the Poker II more than the TKL and absolutely love the placement of the arrow keys on the function layer, I prefer it over real arrow keys actually because I never have to take my hands off the home row.
The trick to it is, is to put to turn on dip switch 1 and 3. This puts the left Fn Key as your Capslock key and your Win key as the capslock key. It makes it very nice to just move you left hand over, pinky the Capslock key and then use the WASD keys to navigate. I also have the Fn+Q as Home and Fn+E as end so I can easily navigate to the beginning or the end of the line. You have to have the program layer toggle on to always have easy access to them, but that is fine with me.
Seriously though, after having a keyboard setup like this and working on it everyday at the office, I would come home to my WASDv2 and find my self pushing the Capslock(Fn) + WASD to try to navigation documents, drop downs, etc. I find it superior and more efficient than the stand arrow keys by far. Probably the same reason Vim users love hjkl for their navigation keys.