I did my PPL at Stapleford and took me about 50 hours including the test. There is a fuel supplement according to how much its gone up with each delivery they get. They cant amend prices each week so vary the fuel supplement.
I did find them excellent though and one of the reasons I chose them was no landing fees as many places don't own the airfield so have to pay for that too.
Not only are the instructors very good, but the examiners are also excellent. Very nice people and they want you to pass and will help you feel at ease flying with them.
I paid for 20 hours upfront at a time for a discount, I felt comfortable with that as they have been around for a very long time now.
Something my instructor often did was invite me to sit in the back seat when he did lessons with anyone in a 172 or pa28, provided they were happy with that of course. I found that hugely beneficial, you can sit back and take in whats going on without thinking about flying the plane.