I own an SP3 and ran Arch Linux on it for many months of constant roaming use, sitting, at tables, in bed, etc. I do own the detachable keyboard. I can say from extensive experience that it is very awkward to use on your lap compared to a true laptop.<p>The problem is that the center of gravity is under the screen&#x2F;kickstand, not the base. The new book looks like a much better option in that regard.