Against my own better judgement, I bought an SP4 i5 256GB model during launch.
It has been the worst device I've ever bought, bar none. Nothing worked right on this thing, and it hasn't gotten any better.
The screen has yellow glow blobs along the bottom edge, after a few weeks some other blobs started showing, these pressure point blobs, like when you would press a screen too hard.
I had all the possible software issues that were reported. Fan kicking in, screen not responding, pen failing, device crashing, bad drivers etc..
On top of that, I was expecting this device to be able to deliver some power, like at least be OK with me coding and doing some photoshop work on an external 4k monitor and an external 1080p monitor, but all it does is struggle, be sluggish and blow those fans like crazy.
It's just a terrible, terrible device and I can't wait to RMA it once I'm back in Belgium.
I donated it to my wife, who uses it for light browsing and emails.