so this morning i went to BB and grabbed an i5 256GB Book with much excitement as i have been enjoying my SP3 for some time now. i know this isnt the Book section and frankly they wouldnt want to hear about it anyway and just thought i would post that if your on the fence and then like me (haha) pick the SP4 quickly i will just say that it didnt take but a few minutes with the Book to see that i personally wasnt going to care for it. its felt like a BIG tablet attached to a keyboard but not like the surface where you get it and the kickstand just makes it all together but more like when you put a keyboard on an actual tablet like iPad or Android. also i use it a LOT on my lap even during work and in shorts i pinched my leg (painfully) at the hinge point almost every time i opened it. it also did not feel small and lightweight but large and odd shaped. i dusted off my MBP 13 and it was taller and longer and in feel much more than in actual measurement. i took it back and grabbed the same spec SP4 and maybe as the Surface took 3 editions to get it right then i will try the Book again later.