When I bought my SP3, I bought the least expensive configuration available. I have a Retina MBPro and was looking for an alternative to the MB Air I have been carrying around. In short, I couldn't be happer with my Surface in general, and in particular, the Pen! The ability to take notes (One Note- I Love it) in a way that actually works so closely like pen and paper has been huge. I also love the keyboard- although, oddly enough- I find myself using my SP3 with keyboard disconnected and with a mouse (I'm not huge on the whole "touch" thing) more and more. My i3 has done everything I have asked of it. Have any of you i3 owners found it lacking for what you need? Thanks!