Summary: The bonehead charging/USB design from Microsoft and Lenovo overrides anything good about the tablet.
Pros: Full Windows 8., Charges quickly., Good battery life., Includes adapters microUSB to USB and microHDMI to HDMI.
Cons: Tablet has a single microUSB port that doubles as a charging port. You cannot charge while connected to a USB device or connect to a USB device while charging unless you are connected to the optional keyboard-dock, which has been discontinued!
Pros: GREAT PRICE ($349 for both tablet and keyboard dock), GREAT battery (with keyboard, 16 hours),and 2 USB 2.0 ports. ultra-thin too!, The regular price is $649 for just the tablet
Cons: The keyboard takes a bit of time getting used to and the touchpad is bit to small. Does not come preloaded with office 2013 like some other tablets. Also it is a bit tricky to detach the tablet from the keyboard dock.
Summary: I chose to the get the Lenovo over the HP Envy x2 because of 2 things. 1, it was readily available and on sale (bought at staples with keyboard dock for $599) and 2, I read that performance was marginally better than the HP Envy x2. There are a few things that make me regret the purchase, but love the convenience. The keyboard dock is excellent in concept, but the touch pad is very very twitchy.
Pros: Very light., The ability to run my development programs such as sql server, visual studios and ms office., Amazing battery life (with the keyboard)., 2 full usb's in the keyboard accessory.
Cons: The optional keyboard keys has so much flex that it makes it difficult to type., The touch pad is just AWEFUL, Very cheaply made keyboard., No back facing camera.
Summary: Window 8 has best performance with best optimization in touch. This window able to support all application some by the store and some by the .exe that mean desktop format not metro. Able to connect it to your other device like joystick, keyboard and much just like your Laptop. 64 GB storage which is enough for window 8. Also can expand storage by 32 GB. Big Screen so no problem in reading. Battery backup is average can be say below expectation.