I haven't seen much discussion here about DTS Play-Fi, so maybe I'll describe my experience with it. I was very skeptical about it because when you download the Play-Fi app you can't do anything with it until you have a Play-Fi device connected to it (ala AirPlay). I'm on Android and am generally opposed to having locked down hardware and apps and I was fully expecting to be unimpressed and end up using a Bluetooth adapter like usual. But so far so good with Play-Fi.
The Android app initially couldn't detect my MRX720. But that was on a wired ethernet connection. After I set up the Wifi connection on the receiver the Play-Fi app worked and found the device. I'm not sure yet if wifi is required for Play-Fi to work.
Here are some images of the app when it's connected, it's a fairly straightforward music app that's mostly a clone of Google Play Music:
Music & Audio Quality:
The Music app is functionally equivalent to Google Music, but unfortunately has a good 2-3 second delay when switching songs. The app lets you stream MP3 and FLAC directly from the phone app without any limitations - this is better than Chromecast which requires you to subscribe and stream all your music from their servers. Play-Fi's audio quality sounds lossless to me, but I don't have a magic ear capable of telling if it's truly "bit-perfect" or not.
The Play-Fi app's volume control does control the hardware volume on the MRX - no more juggling volume between software and hardware. When the Play-Fi app is open the Android hardware volume buttons also adjusts the volume of the MRX but unfortunately does so in 6DB increments which is way too big of a jump. Another more serious problem is the Play-Fi volume slider has unlimited volume control, it goes from -90DB to 0DB which could be dangerous because it would be super easy to accidentally flick the slider all the way to 0DB and blast the speakers at full volume. They (Anthem or Play-Fi) really need to fix these problems, just give me some additional settings in the Play-Fi app to select my own volume jumps, and set the min/max volume and it would be perfect. Also, Play-Fi automatically pauses/mutes when receiving a call which is nice.
looks like it's only Shoutcast stations (?), but I'm finding the sound quality is fantastic and streaming from your phone is so much more convenient than it used to be in the Winamp days. I'm not a big internet radio users but I can see myself using this a lot.
Play-Fi only streams content within the app itself and NOT all sounds playing on the device the way Bluetooth audio works. I'm finding that to be both good and bad. I can be streaming a song on Play-Fi and watch a youtube video at the same time which would be impossible to do with Bluetooth. In the last screenshot above it looks like you can connect to 3rd party music players but I have not tried any of them.
Overall I'm pretty happy with Play-Fi but I still wish Anthem had also included a Bluetooth adapter in the receiver because then you'd have the best of both protocols.