I changed flying schools because I wasnt getting solo, there was at least one occassion where I felt I should have been sent solo. The school i changed to is 600 miles away from me and I went to the area for a holiday and had a block of lessons there. I progresed got solo and completed my PPL. I now hire from both schools depending on where I am and it is usually possible to hire at short notice from the scottish flying school. The instructor student relationship is an important one if you are to progress so find the right instructor for you. If you have done any significant training you will need to take a coopy of your student records with you so you dont have to repeat but the school you are going to should give you all the advice you need. Just dont give up