Resonance is excellent for preparing for Jee exams. I cant know about medical division but for students who are preparing for JEE exams, it provide excellent materials. Quality of teachers is good( not very good) even in medicore batches. I studied 11th & 12th in resonance, Kota and got selected in IITB. Can't say about branches in other cities but Kota Centre is best if you want to prepare for JEE.