If you are looking for a specific use case and are wondering if the Surface Pro is the best at it, you're probably looking at the wrong device. If you want something that is very good at a lot of things though, you really can't go wrong with this. It is my note taking device in meetings, my daily driver as a desktop device (hooked up to monitor keyboard mouse), my reference tool when I'm walking around doing support in our offices, my airplane ride movie and gaming device, my occasional kindle device, my laptop when needed, etc.
Is it the best as a note taking device? Probably not, but it is close. The best as a desktop replacement? No, but again, very competitive. The best tablet for carrying around as a reference tool, no, but when you have all of your documents at your finger tips and you don't have to worry about syncing etc, it is sooo convenient. You get the idea. It does a lot of things well. I love it.