This is a nice twist to the traditional baked brie in puff pastry. I find that the phyllo lends to a more elegant presentation. Phyllo is not that tricky to work with - just keep the sheets that you aren't working with covered with plastic wrap and a damp towel. We traditionally use a 300 gram wheel of Triple Cream Brie, which converts to about .66 of a pound. Because of the size of the phyllo sheets (about 12" x 18"), you could likely use up to a pound of brie.