The handling is very simple and can be explained almost by itself. This controller can Aufsteckblitze in TTL mode (not Olympus) or ignited even in manual mode. Studio flashes can be not correct manually.
The operation is of course much easier than with the YN 622N (see my review).
The group division on the clear display contributes to the precise control of Aufsteckblitze.
All in all, this controller is a "must have" for every photographer who (for Nikon) unleashes his Aufsteckblitze and wants to use targeted.
For this performance, and the price there are 5 star and a strong buy recommendation.
I hope that my review could assist in your decision making.