I love using molds!! It's best to use a 60/40 mix of fondant/gumpaste. This will allow for a really nice impression and your piece will not strech or distort when you remove it from the mold. Most of the time I use Tylose Powder added to the fondant I am working with to make a quicker setting fondant a little like gumpaste but not hard drying like gumpaste. If you do not have Tylose or gumpaste, let your fondant sit in the mold for a while to firm up before you try to remove it. You can dust the mold with a little cornstach but only a very light dusting, as you can actually loose some of the detail from the mold when the cavities in the mold fill with too much cornstarch. Push the fondant mix in the mold and use a flat palette knife to slide along the top of the mold to cut away any excess bulging out. Gently peel it out. One thing I notice about the Wilton molds compared to First Impressions and others, is that the cavites are quite deep, making a thicker finished piece. I prefer a thinner molded peice that does not stick out on the cake as much. I just always underfill my Wilton molds a bit. Hope that helps a bit.