I love the fact that I have a safety net in their great support and their record for timely patches. With many other companies, buying a support contract only gets you whining rights and the privilege of being placed on hold.
BSDi support is worth every cent.
GTE Government Systems Corp. The servers are rock-solid reliable and when I have a question I call technical support and get a call back usually within an hour. I have never had a bad experience. Fast, efficient, and to the point.