Well I give you true review 

I Quants - I feel this is hype !! 500+ (99+) Halwa h kya ! but i believe marketing 
IMS - Their Online mode is good but Offline You need to check the teacher who are teaching 
catking  - I feel they are good ! Proving Innovative Dash board , And Profile portal par IIM Predittor and also amazing 
time - Same is IMS Their onle is good 

Summary = CATKing and Time ( These are Good as per my Experience)