1and1.com really screwed me over a number of years ago by taking my high trafficked site EastsideBusinessJournal.com off-line right while I was negotiating for thousands of dollars of advertising contracts. They gave me no notice and had no reasonable explanation - despite the fact that I was a long term customer and had 67 other domains registered and hosted by them.
When I complained - and started bitching, they closed down my entire account and all of my other domains as well.
Unfortunately, I will be paying the price for 1and1.com's actions for my entire life - as I lost a good number of domains that I had owned for years - and were worth some serious money.
Shame on 1and1.com - use them at your own risk and peril!