My research findings on the various coaching centres:
1. IMS: course fee is 23,900.(one time payment)
number of module tests: around 25 (who cares)

number of mockcats: 8 (all india)
other exams: don't remember.
2. TIME: course fee: 22,950. (provide scholarship on tests and last year's CAT percentile).{provide installment facility: in my centre, I hadda pay 10 grand on start and rest 5450 divided between the next two months. I got a scholarship of 7500 so thats y the wierd addition.
number of module tests: dunno...maybe they don't even have that.
number of mock cats: last year was 15.(all india)
other exams: 10 (2 SNAP, 2 IIFT, 1 FMS, 5 XAT)
Now my views: (you may blatantly disagree..)
IMS is a much more organized instt. They have a better R&D team.
TIME kicks you in the ass and makes you sit up straight and take notice..lol....
Anyways all said and done, I joined TIME bcoz of three reasons:
1. saved money.
2. more tests.
3. better coverage (55 or something centres across india)....
Hope I could clear some of your doubts and apprehensions..
All said and done, if a person's somewhat motivated,he/she would'nt bother much about which instt s/he's enrolled in....pagalguy serves the purpose for the preps....big time!!!