Firstly, if you're after the physical geography stuff, the Edexcel specification won't be for you :/ Nearly all of the spec focuses on human geography, e.g. right now i'm doing rebranding places and globalisation (migration, population growth and such). The other two topics I did were coastal areas (stuff like reason for their popularity, threats, management) and hazards (there is an element of physical geography here, but not really much).
Secondly, the exam consists of two papers; one is your usual theory based paper. and the other is what they call the 'fieldwork and research' paper. Basically the latter involves one question where you have to explain how you could investigate such and such (using your own experiences), one data response question and the other a theoretical and case study based answer.
Now for what I thought of it :P
I wouldn't consider it to be too hard, the details of the case studies may be tedious to learn, but the ideas themselves are very easy to grasp. If you're good at remembering little details in case studies and have common sense, you'll find it, dare I say it, quite easy.
I can't say I really enjoy the course though. The hazards and globalisation stuff can be quite interesting actually, but I find the fieldwork and research paper really really boring. I don't feel i'm really learning anything in those lessons :/
If you have any other questions, feel free to ask me