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.