Delhi is famos for quality coaching classes for competitive exams like IIT-JEE and many medical entrances. But, in case of vidyamandir classes, I must say that it is exception. The the teacher’s staff recruited in those classes is so immature to handle such a skilled coaching for these entrances.
My sister used to study there before few days and from her experience which she shared with me, I understood that they don’t clear the concepts and just go on taking as many objective exams as possible. The real knowledge is not given to the students in those classes.