I almost think is the fact that not the receiver at the bottom have the sony lightning shoes, but standard shoes, which I do not need the adapter when I put it on a tilt head (eg the Phottix Varos II that I find super). Unfortunately, that does not of relatively thin plastic, so you should be a little careful here, a fall rather survive
for operating the sets need 6 AA batteries, I use the eneloops that function properly
The size of the devices has surprised me (about 3x6x10 cm), although all three devices fit into one of the pockets, which you then either the second for the accessories (2x stand, cables, loops, etc.) or, as I did when pocket for battery use.
total ne super thing for all strobist, but you should be familiar something, who are all set to "Automatic", the finger should leave it