I only use the Google Apps for Business from Teh Goog, and while it's nice, the documentation is hard to navigate and not so hot. I expect a little bit of bitrot from such large product lines in the documentation so I understand a bit of staleness, but finding the right documentation and then trying to skim through it... it's frustrating and poorly laid-out in Google, in my opinion.

Maybe GCE docs are better, though.