Microsoft Surface Pen - Silver (Refurbished)

Pen works flawlessly on the Surface Pro 3. The pairing process was virtually identical to the SP3 pen, quick and easy. The first thing I noticed when I picked up the pen was how well balanced it was. The old surface pen felt top-heavy at times; however, this pen felt just right. The pen I bought came with four extra tips (there is a special promotion that includes these tips with every pen purchase as of the time I wrote this review). I instantly changed the default tip on the pen (HB) to a higher friction one (B).Writing with the new pen feels great, the added friction really makes writing on the SP3 a much better experience. Things I want to point out about the pen features:1. Single press eraser button to launch OneNote still work (as does single press to launch OneNote from locked screen)2. Double tap eraser button to clip screen and send to OneNote works just as well as the SP3 pen.3. I had my doubts regarding whether the eraser feature would work properly with the SP3; however, I was pleasantly surprised that the eraser worked perfectly with the pro 3 (tested on Drawboard and OneNote). Erasing feels rubbery, just like an actual eraser.4. Press and hold eraser button to launch Cortana works.5. You can still tack on the pen to the right side of the SP3 where it will magnetically stick if you're like me and don't use the pen loop. The pen seems to hold a bit more tightly this time around.6. Pen latency feels just as good as the previous pen (it may be better, but I only use the pen for writing notes).7. The SP4 pen has a higher hovering distance from the SP3 screen than the SP3 pen (I can hover a full inch away from the screen and it will still register).Things to note:1. Unlike the SP3 pen (which required two batteries), the SP4 pen only requires a single AAAA battery.2. Once I found out that the eraser works flawlessly, I began to wonder if Microsoft had added a feature that would let you to scroll web pages with the eraser side of the pen (this would make sense as you could use the pen side to select text and the eraser side to scroll). Unfortunately, this was not the case. Perhaps this is not possible with the way current software is set up.3. The only has one button now (hidden under the vertical grip along the pen's side). The only complaint I have regarding this button is that it can be difficult to press at times as it is very "tight"; however, this may be a plus as it may prevent you from accidentally pressing the right click (a minor issue with the SP3 pen).Overall, this is an excellent pen, a worthy upgrade to the already great SP3. If you are someone who uses their SP3 to write, take notes, annotate papers in PDF format, etc. this upgrade should definitely be considered.10/10. Would buy again.