By around my 10th hour I had covered everything (all the manoeuvres, dual carriage ways, roundabouts, etc) and I thought at first 'well, what else is there to learn?' but the way I see it is you need experience in driving in different conditions and in different areas whilst you have your instructor by your side. I think it's important to make mistakes (e.g. I once almost went through a red light, I once went to go on a roundabout when it wasn't safe, etc) now those situations are embedded in my mind and I shouldn't make them again, but I made them whilst I had a qualified instructor with dual controls sat next to me. I know learning to drive is expensive and can be tedious but it's important to be safe. I've now had 30 hours and my text is in a few weeks and I've driven in the dark, in heavy rain and strong winds, in rush hour, during school runs, etc.