Hi shruti!! Hope you are doing well!! According to me, there are no best coaching classes a salil the classes are equally reliable and helpful and they all teach the same thing . Its upto you, how you grasp all the concepts and how much dedication you show to understand what all things they teach. Still if you ask, Vidyalankar and pinnacle are of the best classes in mumbai in my opinion for studying Engineering curriculum as they have a great way of teaching and very good modules to refer.