I bet you she feels a hell of a lot better now then she did when she was withdrawing from that crap, trust me on that. 
I'm a strong proponent of Methadone, and have been on and off of it for years, and have been on it for two and a half years this time. It has made it so I can live my life, I can hold a good job without going into withdrawal when I don't have any dope. 
People who have never been there don't know what they are talking about when it comes to Methadone. It's not for everyone, but as far as getting you high, it doesn't, so anyone who says it does is a fool who talks out their ass. I know that without it I can't stop using heroin, so for me it's a lifesaver, and you'd never know it about me unless I told you.