And what made it all the more fun is that they are powerful witches! I really enjoyed their escalating war, and I was in stitches when Sam and Dean are trying to counsel them and getting psychic whammies for their trouble.
It was a great idea to have a married withces fight each other and causing collatoral damage, and a stroke of brilliance to have them played by Spike and Cordelia.
I was really happy when Don Stark comes back at the end and saves them from that levithian because hopefully that means he will be coming back on the show again. He was so good in this role, I would love to see him back!