Is this part hand-solderable, or will certainly require reflow soldering?
It is hand solderable, but fairly close. As the illustration shows, the contact pads extend up the edges with a plated groove, which makes it easier to heat them than on bottom-only QFNs. I suggest extending the PCB pads a bit outside the module edges to let you access both pads with your iron. 
You may want to practice working with 1mm pitch a bit beforehand. Also, I wouldn't want to make a larger production run by hand.