I got one of these players after missing out on the Oppo UDP-205. It's nice to see Panasonic put as much in the electronics as they did with the build quality. I would say the true focus was on video playback, compared to audio. While I have a relatively small SACD and DVD-Audio collection, that feature would probably make the UB9000 a must buy among those look for the now elusive universal player.
The interface (menu) works great for video playback, but not very intuitive if you're trying to use it for a large audio file library. It will do it, but that feature could have used a bit more thought. It will work as a streamer and a network player. But plenty of other devices will be more intuitive with that job. A dedicated app would be nice. Perhaps one will come along in the future.
Not being able to use it as a DAC isn't a big deal for me. I got it knowing it would likely be connecting to a DAC, and not the other way around.
I also have a Cambridge Audio CXN V2 (well bought for $650), and for audio, I prefer the UB9000, if I'm wanting a more transparent sound. The CXN is excellent, but that Cambridge sound is apparent. It's nice sometimes but it can seem a bit much over long listening sessions. As a online streamer and network player, the CXN is slightly more intuitive, but I'd say it is actually let down by its app. Neither are particularly good for connecting your music libray via USB. You can do it on both, but this feature looks to have been an afterthought.
I can't honestly say I can distinguish the two when they're connected to a DAC. Via XLR, the lower voltage output definitely means you have to adjust the UB9000 to match sources with 5V outputs.
Ironically, neither were what I was looking for in a media source. Eventually, I went the media PC route. The UB9000 is relegated to movie night duty, and the frustrating app (and typical streaming issues) had me box up the CXN and put it in storage.