Express pass allows you access to a shorter, faster attraction line on rides ( waits advertised as being 20 mins or less but very often is much shorter than that or walk in).It allows you into seating areas first for shows .It is good on all rides and shows except: Gringotts, Forbidden JOurney, Ollivanders, Pteranodon flyers and Kang and Kodas.There is no return times to track.You simply show your express pass to the express line ride attendant , they scan it and you are on your way. YOu can get unlimited express pass for free by staying at a Universal DELUXE resort ( these include, Royal Pacific, Hard Rock and Portofino Bay).It does not come with stays at Cabana bay .You can also purchase it.The price is dependent on the projected crowd levels and can go up if the projected crowds are expected to go up.If you purchase them they are DATE SPECIFIC,PARK SPECIFIC and NON-REFUNDABLE..so if you want to buy them we recommend waiting till you get there and see if you need them.Early June will start the summer crowds.