I wont be saying anything wrong but yes Vidya mandir classes has its own reputation , this is one of the best institute in Delhi , faculty pannel is also very Good, study material and weekly , Monthly and quarterly Test series is also very Wel defiend . I dont know deeply but Yes What I have experinced most of the faculties are well qualified , physics , chem, and math All are covering by best knowledgeble Faculty .
Lets Talk about Infrastructre , All are AC class rooms , Cafeteria Washroom and Library are well setteled .
If I shall talk about Management then yes its again big Thumsup for them , However they can improved more in infrastructre .
Fee is a issue it is quite high in compare of other same level institute .
Selections , since last 5 year there is no top 10 student but yes more than 50 Student in top 100.
Over all onclusion is this could be a good Choice for IIT prepration .best of luck to all studnet who they will join .