Admittedly, I use support a lot, primarily when my users have questions (or problems) that I cannot resolve. Support is always quick to respond (either by email or phone), and do their best to resolve problems or concerns as quickly as possible. There have been times where some problems have taken over a week, but if you talk to your relationship manager, they can usually be escalated and quickly resolved. Overall -- the support is there when you need it, and is available 24 hours.
Additionally, there is also the user community and knowledge base for those who want to research on their own.