I am pass out student from bansal classes(kota) and now I am studying at iit delhi. I will not tell you to don’t join other institute .you join any institute in kota for preparation of engineering you will get bansal classes study material to read and solve. Every coaching school of kota uses bansal classes notes, DPP, sheets and even test series questions for their own study material.from this you can think of how helpfull is bansal classes notes for preparation jee mains, jee advance or any other engineering colleges exams. if you will check previous 20 to 30 year result
you will find bansal classes kota has given rank 1 in jee advance maximum times.so, I will not force you but advice you if you are going to kota for preparation of engineering join bansal classes it will really help you in future.