OK, among other features, it doesn't have the pressure sensitivity level of the Wacom Pen, but it is most definitely "up there" with some of the best drawing capable tablets within the price range due to how versatile it is. And considering that it's basically a two-in-one, you get so much for your money. Make no mistake, the surface 4 is not your average slate graphics tablet that needs another device to work, this is a complete stand alone, touch screen drawing device. Check out the video review above for a good breakdown of it's Pro's + Cons when it comes to art working.
Heck, even the Wacom Cintiq 13HD is not a stand alone device. It has to be attached to a desktop or laptop. So the sacrifice of the Pro 4 not being as good as the 13HD, but giving much more stand-alone freedom when used for drawing, and a whole host of other features (It's a fully operational computer with Windows 10 Operating System), it really is worth considering if you're someone who likes to design and draw on an amateur level and wants a device that can also be used for everything else from work to play.
The Pen is also very good. Magnetized, and with a nice amount of screen grip, and even an eraser on the opposite end. Just like a pencil. The Microsoft Surface Pro 4 works with lot's of popular software programs, like Photoshop, Coral Draw, Manga Studio etc. Both will serve you well, but for the sheer versatility, the Pro 4 is a smart choice.