I bought a Surface Book recently and I returned it after 3 days.
- The screen has great specs on paper but the calibration was really bad. It was bluish compared to most of my other IPS monitors at home (calibrated or not). I didn't have the chance to calibrate it. Also the panel had this ghosting issue that was really annoying when scrolling text. See this slow motion video when scrolling.
- Windows is not ready for hi DPI displays. Even mainstream software such as Steam or Photoshop have issues with scaling.
- The pen had decent tracking for quick sketching but I had many issues. See this video and this video. Also it was impossible for me to handwrite.
- The tablet experience was less than mediocre compared to iOS or Android. The app ecosystem is very limited and the UI is terrible. As an example you have to actually open Windows settings to be able to adjust brightness properly (auto brightness is not an option).
- When detaching the screen from the base I got less than 2 hours of battery if I was using anything besides Edge with screen at about 30% of brightness.
- I got some frequent graphics glitches when waking up the device from hibernation.
- The headphones jack is in a really awkward place
- The trackpad had a nice surface, but it was imprecise on small movements