Pros: Perfect precision (no mouse can come close), Improves and accelerates your workflow, highly customisable
Cons: The stock pens that come with it do not last very long
It took me a while to learn how to use it and I will be honest with you : the L is BIG! You cannot comprehend how big until you put it on your table. If you don't restrict the movement area, you need to do a lot of sports with your hand to cover the whole surface.
The function keys can be configured according to the software you use. For example, in Photoshop I add my shortcuts on the keys and in Capture NX I add other shortcuts. The ring acts as a zoom if you want too or it will rotate your image if you want.
I tried to use this in Windows Explorer and to browse the web and I must admit it was a pain in the beginning because I always clicked under or above the button I needed to use. Once you learn it is not that difficult to use it everywhere.
I gave it 4.5 / 5 because of the pens. The original WACOM pens do not last long. The tips are prone to fast wear and this leads to more pressure applied on the tablet. If you photoshop or draw , this is a must on your desk.