I'm loving these. A few weeks ago I bought the YN-622N-TX and YN-622N set. Played with them for a couple days and ordered two more transceivers. So far I've tested them in manual, TTL and HSS. Oh, how have I gotten along without them for so long? They are simple to use and so far, reliable. The seem to be built pretty well and hopefully will last a long time. At just over 40 bucks each, they are definitely a bargain!