I picked up the i3/128 GB/4 GB model last December when it initially released and shipped for about $850 with the mobile keyboard. It was buggy as an ultra-portable (with the mobile keyboard) and hot and heavy as a tablet. Returned it after a few weeks of using it, even thought Dell offered me $100 just to keep it. So glad I returned it!
Last week I was able to buy the i5/256 GB/8 GB model with the mobile keyboard from the Dell Outlet for $650! It seems lighter in my hand than previously, doesn't run nearly as hot or as loud with the fans. I haven't had any of the ghost touching issues as with the first unit, and everything runs extremely well. Once I purchase the new-and-improved Active Stylus I can utilize this device as I imagined: note-taking and collaborating tablet, lightweight ultra-portable for typing and productivity.