Hello Vipster
It really depends on how confident you are at filling in the form as to whether you manage on your own with the aid of the guides. If your supporting evidence is strong, and you feel you are in control of the procedure, then the guides should give you the help you need.
If you are doubtful about trusting the DWP in their efforts to help, do you have a member of family or a friend to help you, or perhaps you could contact the CAB or DIAL and they would be able to advise you.
If you decide to go ahead on your own, and hit on a problem, then please don;t hesitate to get on to us as soon as possible and perhaps we will be able to help you. If you bookmark this page, then you will be able to get back to us easily and we will have quick access to your emails etc. I hope you can manage the form. We are here if you need us.