[joshmn]

I have a client, pre-funding but has some revenue, who is hell-bent on using their Rackspace credit for their production environment. "But we have a sysadmin who works for yahoo"

He tries to demo me what they have currently and the damn thing timed out during login. I laughed.

The cost of these headaches is easily avoidable. Get off the ground and running first, pay the kind-of-premium Heroku bill, and when you're ready to really scale, make the switch.

There are few exceptions to managing an infrastructure, such as RackSpace, a cluster of AWS nodes, your own metal, etc. versus something like Heroku.