I bought my Surface Pro back in 2013, and it still works fine. I don't really have any problems with it, except the battery does not seem to be holding charge too well, and I am also running out of space from the 128GB drive. I have an opportunity to upgrade, but looking at the specs, it wasn't that clear that the performance of the Pro 6 is that much better. That's a bit surprising because its been over 6 years. The original Pro has an i5 processor, and the Pro 6 is also an i5, or optionally i7. The Pro 6 is slightly lighter (2 lb down to 1.7 lb), and the screen is slightly bigger (10.6" vs 12.3"). Battery life seems to be significantly better (9 hours compared to about 1 hour I get from the old battery). My question is, is this worth spending an additional $1500 to upgrade? In other words, is the Pro 6 significantly faster and better than the original Pro?