I have replaced a Samsung 10.1 tablet and a Dell Latitude laptop with this singular device, and I love how portable, powerful, and simple it is.
I never used OneNote before, but now I find myself using it all the time. The stylus is incredible. The Type Cover 2 works well for me, and I've had no trouble typing on my lap, or on somewhat awkward settings (like others have mentioned).
I've thought about upgrading to the Surface Pro 3 when it comes out, but I honestly have zero complaints about the Pro 2 (so I'll probably wait another cycle).
One of my favorite apps is Drawboard PDF; outstanding for annotating PDFs!