I had several different instructors during my PPL training and I had few problems with the different teaching styles. When I had to have an instructor as a one off because by usual instructor was away most of the time it was ok because they monitored what I was doing and gave me pointers that helped. The one exception was when one instructor tried to teach me wing down for cross winds in a PA28, I couldnt get to grips with it so just went back to crab. That may have made things easier when I went to the other end of the country and finished my training in a PA38 as having to unlearn the wing down may have been a disaster. The hardest thing I found to learn was having confidence in myself once an instructor helped me learn and find that things got easier.