If Microsoft designed mobile PCs are the essence of the Windows computing experience, and the Surface Book is Microsoft’s flagship, then the Surface Book 3 has a reasonable claim to be the ultimate Windows-powered mobile device.   Pros –       Unique detachable design –       Powerful graphics processors –       Available in 13.5” or 15” screen –       Many configuration options –       Comfortable keyboard –       Dual 1080p camera –       Quality PixelSense display –       Benefits of a Tablet and Laptop Cons –       Pricey –       Keyboard adds weight –       No Thunderbolt 3 port   The Verdict: with advanced mechanical locking system for the keyboard base, powerful graphics processing, multiple cameras and batteries and a brilliant near 4K display the Surface Book 3 is an innovative, excellent detachable laptop, and a high spec tablet with Windows, all in the same package.   There are models with full CAD-ready 3D graphics cards so if you are one of those creative types, someone looking for a graphically capable 13-inch or 15-in laptop, or just a person looking for a deluxe device to indulge in — the 13.5-inch and 15-inch Surface Book 3 becomes an easy recommendation.