Yes, I've been using it for quite some time.
It was fortunate that some of my clients had requested something be done about the spam and you happened to have done this right after I promised I would resolve it. Otherwise, nothing I could have done would have fixed it, it seemed like the tag & quarantine levels did very little to prevent the spam...they were generally mails like "Barbera wrote:", "Happy NW Calvin", and other nonsense. They would change daily to different subject lines. They were also going to all of my domains so it wasn't careless email usage by the clients.
Regardless, the past few days have been a little slice of heaven!