Overall it inspires confidence (much more than the PS4 I sold it a few months ago after many service returns) but has very few flaws "Microsoft" in the interface. Nothing insurmountable if we take good habits (do not throw the SHIFT during the game installation unless you want to play in several hours). The custom windows 8 is a bit messy but it quickly found its brands to get to the point without too much to bother.
The current cross-platform games are well optimized, for now I Destiny, Call Of Duty Advanced Warfare and Far Cry 4 which are visibly at the PS4 versions, the power released by the abandonment of Kinect and the job of optimization of developers begins to bear fruit after debuting a bit difficult on the first wave of games.
The "market" line begins to grow, with friendly games even my less fortunate, unfortunate that this one is still a notch below that of the PS4, quite free to play and indie games to subscribers away. That said there is still an improvement in recent weeks (even with the arrival of the Ori and the blind forest).
I regret that the console will not play for now popular video formats (quite .mkv still blocking for me), it's strange for a machine sold as a media center ... my blu-ray player 60 euros did better on this point.
A word to remember that the console can be used offline after the first update is complete, the games will jump course, even if the wireless / Ethernet is disabled. I recommend elsewhere for oriented players "solo" letting up offline mode console so as to avoid making unwanted day on most games. After the first big charge corrective patch, the following will often apply as multiplayer content additions.