Currently, if you want to burn few disks using this nice interface, you face unpleasing problem:

After you burn a disk, and insert new one, all files that were burnt are present in the window, thus you end up deleting 'em.

This is very annoying.

This window should be cleared ether on successful burn, or at least on insertion of empty disk (later makes even more sense).

If one really wants to burn few disks with just slight modifications, he can always start brasero and create a project.