Reddit guy impressions:
"Tactile feedback with the new pen's nib and eraser was significantly better. I was only able to test in OneNote, but varying pressure provided different levels of drag that are not present in the old pen.
Drawing out slow diagonal strokes with the SP3 pen, it was impossible to avoid jitter.
With the new pen, jitter was still present, but dramatically reduced. Increasing my stroke speed slightly eliminated the jitter altogether.
The eraser tip is amazing. Truly feels like a rubber eraser.
The pen has a magnet along its flat edge that connects to other magnets in the Surface Pro 4 and Book. The SP3 pen will attach to the new tablets but the magnetic hold is much weaker.
The keyboard of the Surface Book is much better than the type keycovers of the Surface Pro 4; however, the keyboard is still inferior to the typing experience offered by a Lenovo Thinkpad.
The larger glass trackpads are excellent: probably the closest to Apple trackpads found on Windows devices."
https://www.reddit.com/r/Surface/co...artist_talks_about_the_pen_experience/cvrac5x