I had taken the Career launcher Kolkata classroom plus web package for mba entrance examinations. On completing the course and their study lessons, I can safely say that this is a premier and really well-guiding coaching centre for cat and other mba entrances. The teachers have a good depth in their respective areas; there are also some ex and current-IIM alumnus. The website is really good. Provides updated mocks and practise exercises in the current CAT format too. The solutions and explanations are well-detailed. There is also an option to bookmark questions. If you get stuck on any solution/ques you can opt for an explanation session in the CL centres of Kolkata. Their mock-percentile predictor is amazingly close to actual cat scores too. This is not a rumour, rather a persona; experience!