Does anyone have any experience with EF Tours?

My daughter has a chance to go on a tour of Ireland, Wales, Scotland, and England along with other students from her high school. But before shelling out the $$$ on a trip like this blindly, what should I know about EF Tours that I wouldn’t find looking at their website? Is this worth the investment or not? I’m hoping someone out there has experience with this company as a student traveller or a parent of one.