I am endlessly impressed by this little device. Against all its competition, there isn't much you can't do on this, which is something you can't say about the competition. The price is just the icing on the cake.
I've been on, in some capacity, almost the alternatives, including units I've built on my own from Raspberry Pis, Banana Pis and other various platforms. Today marks my third Nexus Player, easily the best solution I have found to date at the best price.
This floors the original Google entrants utilizing Google TV (limited by the puzzling removal of the NDK), Apple TV units (just limited by design, unless you can get your hands on the old 2nd gen, despite being reduced to 720p), and all the smaller players utilizing their own custom operating systems (thereby restricting development to only those services with huge operating budgets as their players need to be re-coded, which unfortunately means many of the services you are looking for or may in the future will be unavailable). Sporting full Android TV, it is entirely possible to get most Android apps running on this device (although, obviously, tilt controls and a touch screen will not be present), and I have had success speaking directly to developers about expanding support for this device as, for most home media solutions, this often means a small tweak to the existing code to add support for this family of devices.
If you install the Kodi App as well onto this thing (which will pick up the slack on what can't natively be done straight out of Android or one of its apps), you have a BEAST of a machine that can almost do it all.
Additionally, this device supports most bluetooth devices, including remotes and keyboards, which is handy since getting a secondary remote for this thing is nigh impossible - I connected an Amazon Fire remote to this device so I can access it from the other end of the room, as well as a bluetooth keyboard which allows for configuration of some settings in the unit with significant ease (any device you would use could always be tweaked, and having a keyboard rather than navigating a virtual one with arrow keys is always super handy).
Although the voice control is neat it is more gimmicky than anything, as it only really functions in very select scenarios. I still strongly believe the original Boxee Remote is, by far, the best entrant into this space as it gives you what you need until you need more, and then you just have to flip it over; you can find similar variations of this from third parties now, thankfully, which I would recommend if you would like or use a second remote.
There are other units out there sporting full Android but not very many at this price - if you're looking for a work horse and have a little know how, this thing glows brighter than a pearl with a little shine. If not, if you know someone who does, buy two (one as a gift for them), and they'll make both your lives heaven for half the price.
It's a little sad that Asus seems to have cast this project to the wayside - the units are becoming scarce. I guess at this price point the economics don't make a ton of sense to them, or they are perhaps returning to their business roots. There is a lot of pressure in the space from competitors (especially big money with an interest in crippling your alternatives), so it is really hard to say why these have been so hard to find for the last year. If you see one I would strongly suggest you snap one up.