When you pay for an extension, you expect to get a script that does what it says it going to do. What you don't really know what you are going to get is the customer service to back it up. This extension NOT ONLY works the way it is described, but customer service is TOP NOTCH. I had a little trouble getting it set up (MY fault, not following instructions :/) and within hours of my contacting customer support, they had the problem fixed and I was up and running.
EXCELLENT CUSTOMER SERVICE!