There are some areas of a will that even if executed in another state may not be valid in Florida. For example many states do not have the same restrictions on who can be a guardian or the formalities required to execute a will. Most wills, other than with a holographic will, that are validly executed in another state will be valid in Florida.
Florida requires that holographic wills be executed with the same formality as another will and does not recognize the exceptions for a handwritten will that some other states do.
In a Florida Will you must name a relative or resident of Florida to be a guardian for a minor child.