IMC Rating - It is useful
Just got my IMC rating a couple of days ago -I used it for the first time today, did an IMC letdown (2000ft AAL cloudbase) to a visual landing, and radar vevtors back to the ILS when I got back to home base.
Even flew in between the layers - FANTASTIC.
I know the IMC rating has it's detractors, but if it is used regularly and you keep current it can be used usefully and safely.
It's definately a good way to get experience in IMC conditions, before moving onto your IR.