The noise of the fan was also an important criterion for me. I could "listen" to me before ordering another Yoga with Intel i5 in a typical office environment. This convinced me that I finally ordered the device. Unpacked and booted (the boot process to the 5 sec) I was also not disappointed with respect to the fan. The fan is indeed often active, which is willed by the bios of Lenovo to maintain low temperatures in the device. Well here is the so "deep" is the frequency of the fan, that this hardly registered. So it is not a high-frequency whirring, what would have been a knockout for the device for me. In normal office environment is at least the unit I got was imperceptible.
The performance data of the device are known and require really no explanation. VM's and other applications in the field of software development (which I use so) are supplied more than enough with a i7 and 8 GB memory!
The keyboard is very usable directly for me without getting used. The pressure points and arrangement of the keys is very good. What should be mentioned here is that the F-keys (F1, F2, ...) are triggered not directly but only under additional pressing the Fn button. Instead of the F-keys are there keys for screen brightness, volume, and so on airplane mode .. So in short, the F-keys and function keys are inverted compared to my old notebook with respect to the direct function. An illumination of the keyboard does not exist, which is not really relevant to me. What is, however, struck me at the evening benefit, is that the key labeling the screen light "reflected" and thus is very visible. It comes naturally no illumination equal to but is a very funny idea of Lenovo.
The screen itself is not super bright and matt but compensates for this with it. Regarding the response to touch, I'm pleasantly surprised. Very accurate and responsive the touches are implemented and registered. Grade with the new "finger-surface" of Win8 works very well. In desktop of Win8 it is of course not really suitable to work with a finger (except scrolling). A small disadvantage of the good touch screen of course is that you always have to eliminate finger marks)
The screen hinge is very stable and seems to meet the requirements of different usage modes of the device (Ultrabook, tablet ..). Personally, I see really only the modes of normal Ultrabooks and the completely folded screen (tablet mode) as meaningful. The other two modes are unavoidable through the intermediate stages of rumklappens and indeed be funny to me but seldom to rarely used.
In tablet mode, the keyboard and the touchpad turns me off without any problems. Something weird it was to constantly feel the keyboard on the back, but after a few minutes you get used to it. As mentioned in other reviews, the device is of course relatively heavy compared to a normal tablet. Therefore the use in tablet mode is more suitable for the couch on the legs or sit at the table. This "restriction" but it was clear from the outset. I see the use of yoga as a tablet to a bonus and am very happy with this. I also realized that I have the Tablet mode previously used more, :) as previously thought.
The battery life with normal activity with medium brightness (Web, texts, e-mailing, ...) comes with me on 6.5 to 7 hours .. course, if you requested performance under battery, the life is easy halved.
What I find also worth mentioning, which is mounted buttons for on / off, volume and screen rotation on the frame are to achieve this also in tablet mode.
Finally I can say that my expectations are completely fulfilled to the device. I'd almost say that my expectations were exceeded, but this of course is a purely personal perception. However, it must be said that the price of the device is not necessarily cheap, but for me it is the value. If everything stays and the mechanics and hardware is durable, this is a really nice device which Lenovo has launched.
