It was ok. You could probably pass it in a month if you got your head down.
Structure of IMC is changing soon, see
http://www.trade2win.com/boards/general-career-advice/25222-imc-qualification.html
If you are going to do CFA level 1 you can get an exemption from 1 of the IMC exams so you actually only have to pass 1 IMC exam, which is FSA regs.
https://secure.cfauk.org/qualifications/imc-exam.html
The Investment Management Certificate (IMC) is the most widely recognised qualification of its kind in the UK.
The profession's benchmark entry-level qualification, the IMC is used by most leading investment firms to demonstrate competence for regulatory purposes. The IMC offers an excellent foundation to careers in the investment profession. Many IMC holders continue their professional development by studying for the Chartered Financial Analyst (CFA) Program.