26 months ago i would have vouched for surface now i won't.
I have pro 4 with a keyboard i bought separately. You would be surprised that i have not been able to use the touch-pen ever properly. When i bought the surface it was running smoothly only to show issues related to screen, pen and basically anything within 4-5 months
Now, since 7-8 months i can't even use the keyboard for typing(use onscreen keyboard). Following problems i face are pretty common but notorious(most recent first):
1. Screen flicker that also occurs randomly due to heating - as found on internet. But i have noticed my surface suffers even within 10-15 minutes of startup.
2. Bubbles on screen which occur randomly. So, basically whenever it happens touch input won't work either keyboard trackpad or touchscreen.
3. Random keyboard keys stop responding on pressing while typing. At times keys i,f,0,5, z, x, c, v etc. stop responding and sometimes they work just normal.
4. Touchscreen input lost permanently in the middle of screen lengthwise(2 inch wide).
There are other issues for which i have to go minutely in details.
First two are very common across users, 3rd and 4th may be with my unit only.
The laptop (4GB RAM,128GB FMSS) which i bought hoping it would offer windows flexibility just was not up to the mark. I had Mac in mind but went for windows since mac doesn't offer openness.
I am so frustrated that i wrote a user review on Amazon.in three month ago but it is yet to be published.
PS: Wrote this message on my first laptop, Acer - 10 years old almost, which now-a-days i am using regularly.