Repeating what most folks have said. I did the "research" last year, and had adverse comments about all the large schools in Florida, with two exceptions.
One (FSI) wanted vast amounts of $ to train me to IR, required me to wear a uniform, and wouldn't discuss my "needs" before I got there. Their reputation is outstanding, their training is apparently second to none, but I didn't want to lash out close on $20k to start over again on the IR.
NAC offered to check me out, and then advise me, but expected that if all went well I might even get change out of $2k. I went to NAC, and all was as they said. I now have an FAA PPL/IR and am a very happy bunny.
I had the same instructor the whole time, and he was excellent. Others there likewise had the same inst all the time, and were likewise very happy. The place is extremely well run.
While not everything was perfect, there was nothing I could complain about. Aircraft do develop snags, and that usually delays a session. But NAC have their own maintenance people and the aircraft was soon back on line.
I can't comment on Stiknruda's recommendation, as I don't know the place he mentions. However, I would trust his judgment a long way, so that place certainly should be on the "consideration" list.