If you are as prepared as you were for the PPL practical test, it should be a breeze. That's not to say you need all that, and not many instructors are likely to ask for turns around a point on a flight review, but your knowledge/skill in the areas of legal requirements for flight (pilot and aircraft, documents and inspections/currencies), preflight planning (including weather reports/forecasts, and NOTAMs), aircraft systems, takeoffs/landings, slow flight/stalls, XC navigation, airspace, radio comm, and basic instrument flying (including VOR/GPS tracking and lost/inadvertent IMC procedures) should be solid. If it is, it should only be a morning's or afternoon's work. If it isn't, then you are looking at one of those all-day flight reviews (or even more). And if you get only the regulatory minimum 1 hour ground/1 hour flight, either you're the child of Chuck Yeager and Jackie Cochrane with the FAR/AIM on a flash drive plugged into a USB port in your head, or your instructor isn't doing his/her job right.