If you are looking for a flight school you should carefully research and choose the school you want to do your flight training with. This is how we think about big and small flight schools.
Big flight school:
The bigger the school is the more impersonal it gets. It is likely you are just one of many students that go to that school every day. How can a big flight school know all their students needs? Are there always aircrafts available for every student? It can easily happen that a student that just began his training will be pushed back because another student needs that same aircraft to get a check ride done.
Small flight school:
A small school has the advantage of better being able to stay in touch with the student. The instructor can easily react to any changes or personal needs of the student, because there are fewer administrative steps to take and less other students to take care of.
We think it is important to get a personal training that fits your needs and a flight school that is able to react to the students requirements. This is usually easier with smaller flight schools.