I haven't had any problems with the store-bought bindings. The double-fold wears well. The colors and patterns to choose from are limited, so there are times when making your own binding is the only way to go to get just the look you're after. It might be kinda hard to bind a quilt with denim anyway, so if the packaged binding matches, go for it! I'm sure your friend will love the quilt--Post a picture for us!