MSDN vs Google Custom

Usually, to search for anything related to Microsoft's technologies, One might (at least myself) use MSDN search to avoid seeing numerous (unnecessary) hits as opposed to the Google. MSDN includes the below listed sites for its searching:

                  Forums (forums.microsoft.com),

                  Support Knowledge Base (support.microsoft.com),

                  Code Project (codeproject.com) &

                  Stack Overflow (stackoverflow.com).

Also, learnt (from one of the Microsoft's employee site) that the Google Custom Search gives precedence to Microsoft & MSDN results. To say it, in his own words - it is very useful for looking up APIs, debugging information and general technical knowledge. This extends the search to couple of other "Microsoft" sites (forums.xbox.com, microsoft.com) in addition to what msdn does but excludes the other non microsoft sites (codeproject.com & stackoverflow.com).

Hence, it is upto you to decide, what suites you the best on a context.