For noise: there is not. How could they? a fan does not exist and an SSD finally does not rotate as well.
Heat: Since the thing has no fans, the risk probably great that it is very warm despite core M. But broken by nothing works. I have a Macbook Pro Retina and'm accustomed to much worse. It's getting warm at the back, but now not so hot that you burn your fingers.
The Full HD is the 11 inches really perfect, pixel one recognizes no.
So compared to its predecessor, the Yoga 2 11 Lenovo has reworked a lot here, and can now no longer wish open. The battery life I have not tested it, but after my first impression should aim for the 6 hours.
On the whole, a nice convertible with nice touches and great design. Only the drivers are not fully optimized, from the trackpad could have eg rausholen significantly more. But the device is still so young, there will definitely still one or other updates.
Strong buy recommendation! 599 euros is not worth me the notebook, 799 or even 999 definitely. This is out of proportion, you prefer to buy a 128GB USB drive to or greater M.2 SSD for retrofitting.