I would recommend exchanging your Surface Pro 4.
I purchased one the beginning of the month from Best Buy and it had problems waking up, crashes, the keyboard would not connect, etc. After 3 hrs on the phone with Microsoft tech support and 13 days I took it back to Best Buy and exchanged it. I've had the
new one since Monday this week (11/16/15) and have not had any issues with it (except display driver crash).
Before taking the other one back I thought that the Surface Pro 4 was not ready for prime time and figured that I would just need to get an Apple MacBook Air but since getting this one I can say that thus far I am very happy with the purchase. It is much
more versatile than the iPad due to software compatibility. It's not as easy to use as the iPad when the Surface is in tablet mode but the applications are not dumbed down (like on the iPad) and I can load and use any application I need.
It runs games well too! Currently I have BioShock Infinity and Borderlands up and running, using an Xbox one wireless controller with the Microsoft USB Wireless Adapter.
The pencil works well too. I've used a pencil on the iPad with software designed for it and even when I get a pencil that has a point that is small enough to see where I'm writing, the palm rejection software is not accurate. This means that when I take
notes and rest my palm on the screen, I get marks or the device responds like I'm writing with my palm. I have not had a single problem with the Surface Pro 4 and the included pencil.
I love my Apple products but in my current situation, I need the screen size, compactness, battery life (I run 6-7 hours of typing and surfing on a charge) and full software capabilities of the Surface Pro 4.