I have to Nissin DI currently buy 622 Mark II for 128.54 and I am very happy with the product. The compact flash came after a few days well and securely packed at my front door, and the first shots have not let me down. Although the manual is really very poor, however, all the buttons are self-explanatory. The head can be good move in all directions and both the integrated reflector disc (white) as well as the integrated diffuser should not tear during normal handling or break. All in all, the flash well made and makes a robust impression. As long as the batteries are also not all too empty, the flash is charging also pretty fast, so you do not need annoyed waiting for the green light that signals readiness. Furthermore, the slave function actually works very reliable and is therefore a good partner for the unchained lightning.
The photo in the description very confused, because it again shows the flash and without Mark II characters. However, it shall in any case a Mark II.
Conclusion: The TTL flash Nissin DI 622 Mark II completes my Canon 550D and I do not regret even after several months to purchase and therefore can only recommend him.