A long, LONG time ago when GoDaddy used Snapnames and the cost was $18.95, they worked. I managed to get two very good domains then.

They have failed on every attempt since they changed systems. They do let you switch names and pass your credit onto another attempt at another name if the last one failed... but what's the point? I have three credits with them that I keep bouncing to potential names, but I am placing orders elsewhere with someone else to be sure.