New Computer- Thinking Acer R7

Recently my old laptop broke, which was an Acer Aspire, 15.6". I was faced with a decision between another 15.6" or the Surface Pro 3, and the larger screen size got the best of me and I found the Acer R7. Not, there is just one thing I'm thinking about: how do the Pena compare? I would love to use a pen on the computer, and I have basically no idea how good the R7's is.if anyone with an r7 could chime in, that'd be great!