Just got SurfaceBook i5 8gb. LOVE IT! everything works as it should. I haven't really tested the technical limits like some others here have (multiple 4k monitors with usb dock etc....). using this as laptop and tablet, it is GREAT! devices connect to it easily, the separation of the tablet from the keyboard works great. features of windows 10 are convenient and work great (Windows Hello). I can't wait to get more use out of this! Couldn't be happier! It hits the sweet spot of how I use technology. touch screen when laptop, tablet when tablet is needed.... I can't say enough good things about it!