Google 'enterprise' apps
Google's enterprise apps have a litany of issues that non hosted apps simply do not have.
Replace Notes/Exchange with gmail?
- no administrator option to allow one user to read another users mailbox.
- no shared mailboxes
Replace Office with Google Docs?
- can't open most large spreadsheets or presentations
Worst of all, is that there is no support. Google allegedly have hired the best and brightest, but not seemingly in their support department. We have an open bug against them that they refuse to look at, refuse to acknowledge that there is an issue, and keep insisting that this is our fault, when we show clearly it never touches our systems.