Roland GO:Keys Review for pianists who commute (3 pros and 1 con)

www.kristinfung.com I'm a traveling pianist without a car and I've been looking for a very particular kind of keyboard to add to my collection: 1) it has to be portable enough for me to carry on my back on public transit or my bike, 2) it has to have a good real piano sound, and 3) the action of the keys has to feel more than decent. Oh, and 4) it has to be battery-powered. The Roland GO:Keys is the closest winner for me so far! It will never replace my Roland FP4, my favourite digital piano (discontinued), but the Roland GO:KEYS seems like a great keyboard to grab quickly and take to certain gigs and rehearsals. Let me know if you have any questions!