Disclaimer: I work for Microsoft, but not for the Surface team, and purchase my Surface devices at full price at retail.
I've purchased a Surface Pro 3 for me, a Surface Pro 4 for my wife, and later a Surface Book for me to replace the Pro 3.
The Pro 3, Pro 4, and Book all had a variety of issues. Some minor with wi-fi or sleep stability, others major with hardware failures and crashes.
All of the devices are working perfectly now though, after all of the Skylake-related issues were fixed by Microsoft and Intel, but it wasn't fun along the way. The Microsoft Store always took care of me (and didn't know I worked for Microsoft). They'd always offer replacements for the early borked device, or anything else until things were fixed, until it was made right.
Ultimately though, I decided I like the Surface Pro form factor more, so I sold my Surface Book and now have the latest Surface Pro (i5 / 256GB / 8GB). I absolutely love it.
Unlike the previous devices, I've had zero issues with this one. Performance is excellent. Keyboard and trackpad are top of class - I actually like them better than the Surface Book keyboard and trackpad. The portability is awesome. Battery life is good. Display is absolutely gorgeous.
The latest Surface Pro isn't cheap, but if it falls within your price range, I can wholeheartedly recommend it. I could never say the same about the Surface Pro 4 or Surface Book.