The general rule in Florida is: a will is valid in Florida if it is valid in the state in which it was executed. There are always exceptions to rules, so you should always have the will (or other estate planning documents) reviewed by a Florida attorney.
An example of an exception to the general rule includes holographic wills, they are never accepted in Florida. A holographic will is basically a handwritten will. Oral wills are also not accepted in Florida either.
There is also a possibility that some provisions in the will may not be valid in this state.
You should always have an attorney review your out-of-state will to ensure it complies with, and is valid, under Florida laws.