No product is perfect when it heads out the door. Sooner or later a service pack will be released. When using SQL Server, you should always be on the lookout for a new service pack–not just for SQL Server but for NT. However, I recommend that you do not install it right after it has been released unless you are suffering from a bug that it fixes. First install it on a test machine and use it for several weeks. Also watch the newsgroups and support forums for any problems reported. Only then, after the patch has proven to be stable, should you install it in production.