Hi wilben63
I have known a number of people who have had help from DWP officer with their forms, I do not remember any of them not being successful. The claimants were happy with their awards, I visited for follow up work, such as claiming SDP element.
As to your question 'what percent are my chances of getting this benefit', answer, I don't know. It depends as to what support documents you produce to help with your claim
Gary
Nothing on this board constitutes legal advice - always consult a professional about specific problems