Another recommendation for Sunstate! A breath of fresh air for a Florida flight school!
I renewed my CPL Multi IR with them last year. Jason is the Multi instructor, he is easily the most knowledgable instructor I've ever flown with (JAA or FAA). he will expect and require you to know your stuff! The Seneca is pretty old but is in very good condition, far better than any of the wreckage I've seen at most UK and US training schools.
Friendly people, well organised, no hidden costs or any money up front.
I've no hesitation in returning again.