I don't understand the ludicrous debate over this application.
It's a pretty, simple, disc-burning application. It's not a feature-for-feature replacement for Toast. Thus, if you have Toast, you probably don't need to shell out another $15/$25 for this application. If you don't own Toast and only need a disc burning app to do a few things, then it's probably worth the $15 (as opposed to the $100 Toast costs).
I have Disco. It works great on my G4 PowerBook. I've turned the smoke off because, while it was pretty, it wasn't a necessary feature. Disco does almost everything I need it to. The only thing it doesn't do that I'd like is let me change the amount of time between tracks on an audio CD. But it's the first public release, so I'm certain this is in the works.
This retarded argument boils down to this - TRY IT. It lets you burn 3 discs before you need to register. If you don't like it, or it doesn't have a feature you need, throw it away. If Toast has a feature you need, go spend the $100 for it.