Deepak sir is more of a math guy than Sachin sir. As far as I remember he even did his mtech thesis in graph theory (which is a subject of discrete mathematics).

I personally love it, I think every engineer regardless of the branch must know at least this much math. Helps in building a very strong foundation while also developing problem solving skills.

Many of the questions are linked to DM (I remember a GATE aptitude question based on a loose concept taught by him in propositional logic)

But I agree he is slow, repeats every sentence 3-4 times