One of my friends studied at IMS Kolkata so I am aware of it. At that time he was doing a job and simultaneously doing a course at IMS. However, he did not perform well in DI/LR with the pressure of his job. And get a call from CAP, IIMs, MDI, IIT Delhi, FMS, IIT Madra, VG SOM, IMT G.

Here is the review of IMS Kolkata -

• As compared to CL, IMS Kolkata fee is low.
• They teach with modules that have difficulty mode from easy to medium. The module is well prepared so that students can score well in CAT.
• DI/LR section taught by Parisit Sir, who teaches in a basic way instead of giving shortcuts.
• The verbal class was okay. You can also go to the portal to complete all the mini-tests to improve your score.

Therefore, you can join IMS as it is good. Apart from it, you must also take test series and Time Study materials to practice so that you can perform well.