Some of my experiences using Google to run my business:
1. We use Google Docs for all documents. Recently, after an employee left the company we deleted his account. Every document that he shared with the company is still visible in the Docs list, but there is no way to open them. It returns an error. Posts on Google Docs help site have gotten 0 useful responses other than "documents shared with others should still be accessible". They are not. There is no tech support.
2. We use Google Voice. I had business cards printed and the web site changed to use our Google Voice number. After a few customers complained about my disconnected number, I started looking into it. Apparently certain numbers cannot call Google Voice. The entire 941 area code gets "This number is disconnected" when they try to call. Posts on Google Voice help site have gotten 0 helpful responses. There is no tech support.
3. We use Google Adwords to run ads. Recently an employee who was new to the system created a test campaign with up to $10,000 a day limit pointing to www.test.com. Little did he know that campaigns are created in a "Running" state. And, even if you don't authorize Google to extend you credit, they will. Luckily I noticed the problem after only 3000 damage. Google tech support was non-existent. Luckily their collections department was a little more accessible and gave us a 10% discount on our mistake, and closed the account. They also delisted an unrelated website from Google results.
4. We hosted an old web site in Google Page Creator. For months, when we logged into Google Page Creator a message appeared that said something like "Your pages will soon be automatically migrated to Google Sites". When Page Creator was shut down Google nicely migrated the site to garbage and deleted all record of it ever existing.
Oh, put the chair down, Ballmer. We know it's you.