So, now I have my Ativ S for 4 weeks in use and can only say, really great! It looks super-quality and is processed, Spaltmße also fit and it collects dust anywhere. The battery cover feels somehow very different than I had imagined, as if it were coated with any paint coating. The whole unit is very smooth and you have to watch already, that it does not slip out of your hands. In terms of size it is but perfectly in the hand and can be operated from me with one hand still good. It is very flat and nice and light. The HD Super AMOLED display is super! Much leuchtsterker and more colorful than the HTC 8X SLCD2 from. However, the 8x looks much sharper. On the display is writing, surfing and playing a real pleasure! The battery lasts on average about 48 hours at a service life of about 3 hours a day. (WLAN and cellular connection I have to always and every 30 minutes to my messages synchronized). Compared to 8X I would now say that the battery holds about 30% longer. As for price / performance, I fnde that the price is ok, when compared with HTC 8X and Nokia Lumia 920, it is in the middle. But in my opinion the best display, the best battery and a memory card slot. Only with the camera, it probably can not keep up with the Lumia 920 but you can not just have everything.
In conclusion, I would say, who does not attach great importance to an excellent camera and rather simple elegant design is as in bright colors, which is well served with Ativ S. For my purposes, definitely the best WP8!
Supplement because I just saw that stands in the article description that Micro SD cards are supported up to 32GB. I use a Sandisk 64GB SDXC and it works fine!