Testing the GrandCentral WebCall Button

I have been exploring the features of GrandCentral a little more and they have a WebCall button feature that you can incorporate into your website, blog, etc. The feature allows the perspective caller to enter their name & phone number (which can be kept private) and then the system, GrandCentral calls their phone and connects to my number. Nice service feature for people to contact you via phone direct from a website. I am testing the service below before adding it to the ACE Computer Services site:

In testing the service myself it does work fast and it was very easy. The call shows up as "unknown" on both phones - the one I entered on the website and the phone my GrandCentral account dials.