I've had a couple of these for about 2 weeks (also purchase some RF-603's to replace my worthless cactus v4's). The flashes are great, they work with out any problems including the wireless triggering. I guess you could say the zoom motor is a little noisy, but that never bothered me. The 603's I think are working great as well, and I am loving the remote camera trigger (something I thought I would rarely be using, I now use all the time).
I purchased from youngnuostore.com (until about 10mins ago after reading this thread I thought they were the official store...oops). It took about 3 weeks to receive, which is a while, but it was in keeping with they listed as their estimated shipping times (I spent an $4 to be able to track my order which came fedex once in the states).