After a few weeks using this phone, I can say that the HTC Windows Phone 8X has an excellent design thanks to its curved lines and monochassis colorful body, which is also great to hold.
The screen has one of the highest pixel density in the market and, while it is a little bit small for today standards, it should be big enough for most users.
Performance in applications and games is excellent, and Windows 8 interface moves smoothly thanks to the Snapdragon S4 dual core processor at 1.5GHz and 1GB of RAM. Unfortunately the internal storage is quite limited with only 16GB.
The camera performance is quite good, also not as good as the Nokia Lumia 920 in low light conditions. If you want to see a comparison between pictures taken by HTC Windows Phone 8X, HTC One X+ and Nokia Lumia 920 check this
analisis del HTC Windows Phone 8X article (text in Spanish but pictures can be easily found)
Finally, its price tag makes this telephone a very attractive option for anyone looking for a Windows Phone 8 device.