RVAC - I have never done any training with them but I have used their club to prepare for my flights and have found them helpfull. Although From what I saw you are pretty much are another number. If you are looking for personal attention you are better off going to a smaller school. They have been around for many years so obviously they are doing things right.
It really depends on what you are looking for in a flying school. When you are training you really don't want to have more than two instructors teaching you. It gets to confusing getting used to them all and there different quirks!