Mazzei is a good school. Their training methods differ somewhat to traditional methods with primary focus on visual attitude control from the very beginning. They have a very well maintained fleet of Piper aircraft, the primary trainers being Tomahawks. Their standards are very high and while you will receive good instruction, you won't be led by the hand and will be expected to demonstrate and maintain high standards of skill and knowledge throughout your training. The school has been around since 1935 and under the current ownership since 1977 so they have a solid history to back up their reputation. Although many here may not have not heard of them, they are very well known in the industry. The only thing I would say is if you go there, just stick to the training plan and don't get involved in too much partying, which isn't hard to find in Fresno. They also do Helicopter training in R22's and an R44.
Good Luck.