I just bought one about two weeks ago, so far I'm very happy. They had both last years model and the new models. Last years model seemed much heavier, so I would suspect the power transformer has change somewhat and I almost did not buy it. I'm old school, it's not easy to create that much power without an hefty transformer. It replaced an older Onkyo surround system that was an add on. My older system was a Niko pre amp feeding a Sony ES power amp split off to the Onkyo. I'm still running some older model AR 610s and for the rears some AR 19s with DIY JBL sub and DIY Bose/AR center channel.
Set up was very easy and straight forward and I like the settings is made for the THX, you have to do a tad bit of lieing to get the speakers lined up without the right and left surrounds but it can be done. The only thing I have found that I do not like, is that I cannot set the EQ for different input devices, that would make for a very nice option and if it is possible, then I have yet to figure it out.
Anything in particular you want to know, give me a yell and I'll see what I can do.