First of all something positive:
The battery is really great (average work on the PC: 6h battery life). Therefore it is highly mobile with the Yoga 2-13 on the road. The heat development is not bad. Even after prolonged operation can the laptop still have on your lap without getting a burn (this is the fan a little louder). What I would like to see even more, is a fan Idle mode, in the event, because the fans always at least a little running.
To screen:
This laptop is a Full HD screen with IPS panel is installed, which provides very good color. Even the Touschscreen works beautifully and makes work easier.
The first shortcoming was the keyboard. Although this is lit, but this is the only positive thing you can say about it. Typing on the keyboard is really very tedious. I had in front of a Thinkpad L420 and this was typing, a lot easier. However, this is bearable.
Another negative would be the operating system or the preinstalled programs. With me Superfish was preinstalled. Superfish is a virus that is pre-installed on all newer Lenovo notebooks. Meanwhile, there is a tool available on the Lenovo website for removing this software, but it can not be that one is so careless and installed an adware / spyware on a notebook.
Personally, I have Windows 8 is removed and Arch Linux installed. It also does everything except the automatic screen rotation (of the things that have 8 also works in Windows).
Finally even the biggest criticism (and the reason why there are only 2 stars.
In yoga 2-13 an extremely poor network card is installed. Thus, it often happens that I have wireless receiver no longer and I can no longer make the internet. Both at the university, as well as at home, I lose every 1-2 hours for 2 to 3 times the reception and will have to reboot, or the Wi-Fi off and on again, to re-use the Internet. Since Lenovo has really saved at the wrong end, because these days the internet is actually one of the most important functions. So I can not use and recommend in no case this notebook.