I've done it; personally, I pay the extra $5/month for static IP addresses. Depending on your upstream provider, though, it ranges from difficult to impossible

I've done it; personally, I pay the extra $5/month for static IP addresses. Depending on your upstream provider, though, it ranges from difficult to impossible to get the reverse DNS for "your" static IP addresses set to something reasonable. Maybe for a business account they would do it...but for a home connection, forget it. Trouble tickets asking for reverse DNS updates will be ignored.