That is how I learned to applique. Freezer paper and glue sticks. This is the only method I have tried so far and I do like the results. First complaint I hear people have about using freezer paper, is having to reverse the pattern. You don't have to reverse your pattern, you can draw directly on the shiny side of freezer paper if you use a "wash" pencil. (of course you will want to transfer any important markings to the dull side as that is what will be visible when working on your project.
I like that I can pre-assemble all of the larger multi-pieced elements
I can leave most of the pieces aside until I am ready for them..........I just add a few at a time, stitch and then add more
With the pattern lying under the fabric as your guide, line everything up and continue to add pieces. (oh and I glue these down as well) I only use pins where absolutely necessary.
You get very nice smooth edges and wonderfully sharp points. BUT with this method, the freezer paper stays in until all of the stitching is done.
Then you slit the back, hold your breath as you immerse it in VERY warm water. This dissolves the glue while softening the freezer paper which you pull out through the slits you've made. So the big drawback here is if one of more of your fabrics might bleed. I add a few drops of a product called Retayne to the water and so far I have had great results ( or maybe I've just been lucky) We will see what happens when it comes to this block as one of those birds is really quite purple & red.
I still have a bit more stitching to do, tune in next week to see what happens (insert scary music here)