Actually, I got the previous adapter replaced for free by going into the 57th St Apple store, waving the burnt off cord around, and speaking loudly that it almost set my tablecloth on fire. (with other customers staring with great interest). Basically, they stuck a new adapter in my hand and ushered me out the door. Yes, I tried asking nicely first.

With this one, I found my sister's broken adapter with good MagSafe and frankensteined the two together. F--- paying Crapple a few hundred bucks to replace what would have cost them 5 cents extra to build properly in the first place.