Personally I think it's an extremely worthwhile qualification, and shows that you're committed to an ongoing course of continual self development. Obviously it's not an alternative to an MBA or PhD or whatever, but it does have real rigour and is intended to act as confirmation that you genuinely do have a complete/balanced set of core consultancy competencies. I think it's worth having because so many people call themselves a consultant these days, when in fact they are not. The CMC shows that you have been appraised by 'real' consultants who have in effect endorsed you and confirm that you are also a 'real' consultant, with all the skills, attributes and personal qualities that go with it. It's actually a lot more rigourous tougher to get than many people realise. So... I think it's well worth doing. Even if it's not recognised by many employers yet, you'll learn a lot in the process of getting it. Plus you'll make useful new contacts along the way.