Attended BYJU DEMO Classes. Below is my opinion
1. He teaches basics
2. shortcuts are awesome
3. Morally positive words
1. Takes classes @ a very faster rate
2. if we miss some concept then we will miss the other concepts related to that
3. Doubt clearance after the class is over for atleast 10 or 15 mins is highly necessary due to the fast phase of the class.
If somebody feels different do let me know your comments and provide ur suggestions