I found PHPJabbers by accident a few years ago. Bought some of there stuff and impressed enough with the high quality of their software I kept returning for all my scripting needs where they were able to fulfill them.
Then I made a purchase I wasn't't entirely happy with, not for the quality of the product, but rather for the functionality that I had misunderstood before the purchase. Becoming cynical over the years by the typical response we get from software companies I files a ticket and figured I'd grin and bear it.
I was stunned at the positive and friendly response I received and multiple solutions were proffered to me, including changing the software for me to reach the functionality I desired. Needless to say I am over-the-moon with satisfaction, not only in this scenario, but every contact I have had with them.
More companies need to be like this: providing both: Outstanding quality software and amazing customer support that shows you they really do care about your product satisfaction.