As one who recently did an IR at Naples Air Center, I have to say I found the instructors cheerful, motivated, and excellent. They chatted with students, joked, and taught superbly. The rapport between students and instructors is excellent.
Compared with other places in the US where I have tried to learn, something is right at NAC.
My instructor was 1:1 with me for most of the time. We did 3 to 4 hours a day flying, and 2 to 3 hours a day groundschool. I was tired at the end of it, but he seemed pretty chirpy.
I have no connection with NAC except as a happy punter.