Definitely make an appointment. My iPad wouldn't install 9.3.3 and tried everything and would just not install even in dfu mode and kept getting the Error Code 50. Last week I checked, earliest available was for today. Checked on Friday again to see if there was any thing earlier. They had 1:50 pm available on Saturday and I quickly rescheduled and moved it earlier. Got my replacement today as they had to order one for me.