I too have pondered this question as I'm rapidly approaching the point where I'll need to get my MCC.
From what I gather you appear to get a different answer from people each claiming all manner of things. I have been told by at least 2 sources that only 3 people in the class got through and another that almost all will succeed and it's upto you to fail. Yet others warn me to stay clear and ddo my MCC elsewhere as you rightly pointed out far cheaper.
Guess we'll just have to get a conseus on this issue and make our minds up from that.
Good luck anyway ....