Hi, my lessons are booked for 2 hours each time, but i end up with acutal flying time of about 1h30min or 1h45min due to getting the plane out, checklists etc...
I have no experience in having lessons of 1 hour but i can tell you that i'm quite exhausted after my 2 hours lessons. I choose for 2 hour lessons because i do not wan't to rush things and do it step by step without having to look at the watch all the time.
Happy landings