I am a student who uses this website, and my experiance has been either just fine, or abysmal.
To put it simply, a lot of the times I try to watch a video that I need to watch, to complete an assignment, the video won't load.
Sometimes this problem occurs for only one particular video, and it only lasts a day, and sometimes you can't watch any videos for about a week. Either way, this bug prevents me from finishing my classwork on time.
If CollegeBoard is going to charge us $100+ to take a test, then they should at least give us a working website to help us prepare.