Yes, transparent indeed. I have 2 powering my mains as well, and it has made a huge difference. I also included a Monster HTS 5100. Both the amps and the Monster were integrated at the same time, so I didn't here the (just the) amps prior.
As my friend said..."Geez, I think I can actually feel the music as well".
Go for it. You've got 30 days to decide. I don't think you'll be disappointed.
Mike