I believe it's a great institute with a very trendy mode of teaching.
I have joined Byju's at the start of June this year and I am enjoying their out of the box techniques and cool methodologies to solve a particular section, be it Quant, DI, Verbal Ability and Reading Comprehension or Logical Reasoning. I have taken up both classroom as well as video tablet mode of learning where classrooms are being held over the weekends. But I find video tablet to be more effective as Byju Sir himself is seen giving lectures and techniques.
As I will be appearing CAT for the first time, I dont know if I will be able to crack it or not, but Byju's has infused a lot more confidence in the approach of my CAT preparations. And if I will not be able to crack it, it would be only for my efforts because Byju's has lived upto it's reputation in healthy teaching and its efforts in identifying question patterns in CAT and making it simpler for aspirants like is rather excellent, though the Representatives and other parts of its administration needs to be improved.