- Their network ranges are very likely to be blacklisted by essentially everything that employs blacklisting.
- The disks/volumes should be treated as ephemeral. There is no redundancy.
- Their SLA is a joke. I had a mailserver crash in the night and not booting, sent a ticket in the morning, resolved next evening. "SLA does not apply because problem was not a power failure". There is no SLA anywhere in their T&C, it's just mentioned on their marketing site without any detail.
- Turning off systems takes 30+ minutes. They mirror the entire disk to their storage system (very slowly) and free the entire machine (and you're still billed for it). This even applies if you resize the machine or add a volume. Turning on systems is a bit faster, but still in the 20+ minutes area. Oh, and you have a chance of not being able to boot again because although yes, you are billed, they're not reserving a machine for you.
- Can't pick own kernel on some machines. Arbitrary restrictions on number of volumes / addon services that aren't documented anywhere. They tell you when you try to hit save.
- Their network stack is crap. No machine gets an assignable public IP. If you attach an IP you still have the private IP on the NIC, but some firewall NATs traffic to you. It's also just slow in general.