ok your gonna laugh at this but it only been a year and 1 week since i got certified o/w. me and my buddy got the scuba bug and didnt stop all winter long, sunny, rain, or snow, we dont care we love it. got my nitrox back last oct. when i finished my ao/w. hey by the way i am also padi so i know the test didnt change yet. good luck with it its not that bad. michael