I've been a Pioneer-addict since the early 1970s, when receivers were insanely heavy, but sound was wonderfully rich and full. Over the years I've purchased many more Pioneers, some better than others, but they all still had a certain "punch" or fullness that I could coax out of them. I decided to go with this Sony STR-AN1000 because of the wireless subwoofer option, and my better half wanted the subwoofer across the room and no visible cables. I paired the STR-AN1000 with the Sony SA-SW5 300W Wireless Subwoofer and into my existing Bose surround speakers, replacing a Pioneer VSX-1180 that did not have 4k capability. Went through the setup for the STR-AN1000, pretty straightforward including the sound calibration. The wireless subwoofer connected right away with zero problems, definitely a plus as I was expecting some kind of snafu. Once everything was set up and calibrated, I put on an action movie with a bunch of surround in it - the result did not really impress. It was good, but only good. That massive, expensive subwoofer works, but it's nothing to write home about. All in all, it's not as good as the Pioneer it replaced from a sound quality perspective, or maybe I have to tinker with it some more. Another thing I noticed is that there isn't a lot of power in terms of raw volume. Again, it's a mediocre, disappointing experience. I know there are high-end receivers and subwoofers that cost a lot more than this, but for well over $1,300 for the pair seems like there would be at least some "wow" factor. Still, 4 stars because it all worked first try and was easy to set up. I'll keep toying with it and see if I can find a way to make it shine, but at this point, "meh".