I would say it's worthwhile depending on your target opportunities. It impressed my current employer, if only they knew how easy it was to obtain! There is the barrier to entry of having to take a VMware authorized course, but the exam itself was very simple. If you are applying for a job where they do significant virtualization (which is most places) and you will be interfacing with that environment then I think it's rather useful. I do not know that it has directly contributed to my earning potential, but it's part of the package that is "ME" so it's hard to say that it hasn't either. I am in the SE United States. Ping me offline if you have specific questions and I'll answer if I can.

Thank you for your honest opinions, it was very helpful.

What are you trying to achieve? It doesn't seem like you're hurting for credentials. If you're not shooting to be a vSphere admin or perform some sort of virtualization security consulting, I really don't see it doing a lot for you. I'm a VCP on 3.5, and I'm never going to update it.

If you just want to learn, there are some really good books out there, and VMware's whitepapers are very well done (i.e. they have a very detailed hardening guide). It seems like you don't have a problem with learning, so you could probably self-study to get wherever you want/need to be.