Once set (you can find on the web much more explicit videos that record) and mounted on the case, it's only happiness.
So, I bought two YN-560 III to complete my strobist kit. Luckily, they are 50.
In short, it makes us YN560-III 4 + 1 YN560-TX 240, ie a "simple" price Nikon SU-800 ... Of course you have to accept to work in manual, but that is all the interest to practice multiple flash, right?
I withdraw just a star in terms of the contacts of the hoof that are a little too long on my copy. It hangs a hair on my D800, but much to my D3s and it's embarrassing.
Otherwise, the construction is adequate at best. This is perfect for the occasional amateur use, but it is not for the pros. Considering the price, it makes sense.