Have owned the Denon DNP-800NE for 2 months now, and no bugs.
HEOS app works flawless on I-Phone, laptops etc.
HEOS doesn't work with Windows 8, wish it did.
But I don't really need it, because I have Spotify App on my PC.
The sound is CD quality at minimum, but usually better.
I chose the Denon, because it works with so many cloud streaming services, unlike the UK brands. I have had good experiences with Denon products since the 80's. I upgraded my Wifi router too. That is where most music streaming fans go wrong. Now, I never have drops unless there is a cable/power outage in the area. There are some good tips on Audio Advisor, and Auralic websites.
Ended up buying the matching PMA-800NE amp just recently, and so far I am very pleased. The streamer remote controls the Amp, so I never even bothered to unwrap the PMA-800NE remote. It's nice to only need one remote.
And with HEOS on my I-Phone, I hardly even need a remote anyway.
Matched with Wharfedale Dentons (anniversary series) and nearly every recording and genre sounds good.