I am enrolled with Multiflight on their ATPL ab-initio course, currently studying for my ATPLs before starting the CPL and IR etc. Bit of info based on my experience thus far:
First of all, their partner London Aviation in Florida were brilliant. I had an excellent instructor and got through my FAA PPL in hours budgeted for.Danielle organises the place very well and is a very calming influence when it comes to check rides etc, especially the JAA conversion as she is the examiner. She knows how to get the best out of you and actually enjoy the check ride whilst at the same time working you very hard.
the hour building process is good fun, although hard work, averaging 3-4 hours flying a day 6 days a week in 30 deg heat. Having done your PPL training in the lovely shiny and comfortable C172 you may find tootling around in the older C150 for100 hrs building in the heat somewhat harder, maybe thats only cos you are spoiled rotten n the C172. Therefore my suggestion here is maybe to think about budgeting for (no more than) $4k extra to do all or some of your hour building in the 172. Having said that, it is purely personal choice,my only point is that once you've spent 40-50 hours in one of the nicest PPL training planes you could wish for, everything else seems a bit bland
i did roughly half of my hour building in the 150 and half in the 172. The upside of the C150 is that it almost exclusively becomes your plane for 5 weeks, like having your own personal plane as it is only used for those doing hour building, whereas depending on schedule you have to fit in with everyone else for the C172 s, but thats no major deal.
Naples is a great place to stay for 10 weeks and you'll get to meet plenty of people form the various schools as well as private jet pilots etc working out of the airport. Naples is a fantastic little airport, very busy which is good cos it gives you experience of coming in and out of an airport with lots of jet traffic whilst at the same time its an airport that caters perfectly for student pilots with excellent resident ATC controllers. With regards to weather, i was there March to mid-may. March and April are as near to perfect weather as you could wish for, both in terms of pleasant weather to be in and for flying. I guess this would apply for Jan/Feb too. Late May through to October by all accounts can be tough going, high humidity and daily thunderstorms. its certainly worth thinking about, especially if you're going to be there for 10 weeks at least.
With regards to Multiflight, the atmosphere there is great, and from the little i've seen so far and from what i've heard, the instructors are excellent.The administration side is also very well organised. As i'm studying now i'm not doing too much flying, but i'm trying to take the opportunity to go back seat or right hand seat with other people to at least get used to some procedural differences in UK flying (as opposed to Florida) so that i won't have to learn it all from fresh when i start my CPL. One of the hardest things seems to be R/t but i'm sure this will come with practice.
I hope this helps, if you want any more info or opinions please let me know