What can I say ... it works flawlessly. The manual for the TX and the matching YN560-III with integrated Receiver's on Youtube even in German. After that, it was a breeze. The instructions included unfortunately only in English and rather bland. Basically, the buttons are, but clearly and logically, even built-explanatory.
The YN RF603cII work perfectly. I can supply the 560 II flashes also continue to use. But this can not be adjusted via the TX, which is actually logical. The camera triggering I have not tried because I do not need.
Conclusion: If you do not want to run every time the flash to adjust it .... For the TX is a real bargain. Am always thrilled about the price-performance ratio. Reminder: The flashes are completely manual. The TTL-solution (622-TX) is for me not in question, because I need as Pentaxnutzer P-TTL.