I just started using the 468 II. Very basic photographer at this point. I am happy with it. I think of the "problems" I am having, is the same type of problems that I would have with a Nikon speedlite. The most common issue I ran into yesterday, was that I couldn't always get the right amount of light in the picture. The subjects would often be dim. This was in a typical square room with normal ceilings and a decent amount of ambient light. Flash head was at 90* and card was pulled out with flash in TTL mode. Not sure what I'm doing wrong. It's not the flash though, I have a pretty good feeling it's not.
I own the 468II and the YN560II, both used with my D90. I've had the 468II for a while now and it's been pretty damn good. TTL works well, power output is decent, but not great, and for the price, it's pretty solid. I've dropped it a few times without any issues. The 560II is also very good, no TTL though. it is a good amount more powerful than the 468II, easier to change settings also. For 60 bucks, it was a no brainer for me.
