I find that my laptop's keyboard isn't all that comfortable to type on, and I find myself making more errors than usual because of it. So, can anyone comment on the Poker's portability and usability?
I own a Leopold Tenkeyless and even that I find is fairly portable. Though, at times, I wished I had a Poker or Choc Mini to take with me for writing papers and such at different locations on campus. Think of a Poker as the size of an A4 sheet of paper (give or take some dimensions) and therefore fits fairly well into a backpack alongside a Laptop. For safety, as with a laptop, I would advise a case of some sort (even if its just padding).
Usability wise: I don't really have any experience with the layout of a poker but if you are just doing some regular typing and are not too concerned about using your Function-Row at the same time as your Number-Row I don't see any major issues.