I've got my RX100M2 yesterday.
One observation: It seems that Sony has lacquered the hotshoe with nonconducting black color. The mid contact is silver as are the inner edges of the hotshoe itself. This leads to contact problems with ISO-Hotshoe accessory like RF602. Pixel Adapters with mounting screw can get contact if put on with care. I don't know what Sony engineers thought when they decided this one