I am currently studying in allen so I would say that it depends on calibar of student.For some students with great intelligence level can grow more at allen as the facult focuses on them more but I have seen many with low intelligence level but doing great in allen.
Most of the faculty is good and motivating. Plus point is you can get your doubts cleared from other teachers too which will be present at auditorium. Regular tests with analysis will be provided on the allen csat app.
Well furnished and equiped air conditioned classes are provided.