So I got a great buy on the MS Surface Pro 4 at Best Buy at a pre Black Friday sale. So far I am loving it. The deal was on the computer/tablet and keyboard. I bought the stylus separately, for $40.00. I have not used it yet. Is there value in using the /stylus/pen, or is it just a "toy"? They say it interacts well with One Note, but I have not used that much either.