As a counter note, I had been using them for about 16 months straight, ending about a year ago. During the time I was onboard, my monitoring services recorded about 30 different occasions when my server/cluster went offline, each for generally about 30-120 minutes at a time; there was one month that my cluster had seven or eight outages, one of which was for nearly a day.
When users (like me) are relying on the server to host email accounts, mailing lists, and subversion repositories, downtimes like that are just absurd.
Good thing though is that I absolutely love Slicehost, and for only a little bit more $/mo, I have a VPS solution that hasn't gone down even once since I signed up. The only downside is that setting up your own email server is a pain in the ass... :P
FWIW, Dreamhost doesn't even recommend hosting email on their servers, even if they offer the ability to do so if the user wants. They're trying to migrate people off to Google's custom domain services.
When users (like me) are relying on the server to host email accounts, mailing lists, and subversion repositories, downtimes like that are just absurd.
Good thing though is that I absolutely love Slicehost, and for only a little bit more $/mo, I have a VPS solution that hasn't gone down even once since I signed up. The only downside is that setting up your own email server is a pain in the ass... :P