I have a yoga now for several weeks now in daily use.
Consciously I had opted for the 3G version to the move "mobile" to use, not to be in its dependencies of the battery life of my phone.
From the equipment and in particular of the enormous battery life I am absolutely thrilled.
The here of öffteren mentioned "limited image quality" (not full HD resolution) affects the use in any way.
Also, the update to Android 4.4 *** could be installed without any problems. All my data (previous data backup) are available after the update.
If you were to ask me:
Yes - I would highly recommend this Yoga.