Pros:
Good price.
Quick.
Decent quality instruction in some schools,
Good continuity of training.
Cons:
Most ask for upfront payments - so if you don't like the school, you will loose a lot of money on cancellation charges.
The myth that the weather in FL is perfect for flying is utter bollox.
Training will take longer than advertised - so buy a flexible ticket, or be prepared to spend a fortune on last minute, one way fares home.
If things get nasty, no matter how bad, you do not have any legal rights or protections from the FAA or CAA. So think carefully before committing to anything.