Cake baked in silicone pan, left, vs. conventional pan.
I had occasion to do considerable testing of silicone products against conventional cookware recently. You can see the results of a cake test up top. Same recipe, baked in the same oven at the same time, position switched partway through. The cake in the silicone pan (Wilton) baked much more evenly, as you can see, though it didn't rise quite so high.
With cornbread, I did an additional test: silicone pan, nonstick
and cast iron. The silicone version compared beautifully to the nonstick, but took a few minutes longer for optimum browning. The cast iron was still the crustiest, but only by a hair, not enough that I'd worry about it -- and it did stick. (Bill, I'd love to see your recipe. I'm looking for a cornbread that's less crumbly than the one I've been making.)
On the other hand, gelatin molds required all the dipping in hot water and other tricks that Mom taught me on metal molds.
I hated the silicone oven mitts (SiliconeZone). Not only did they make my hands sweat, they transferred heat uncomfortably when I tried to move a hot oven rack. Too bad, because I'm always catching the cotton ones on fire and the leather welding gloves I've tried as an alternative can't be washed.
The thing is, there's silicone and silicone. Just like conventional pans, they come in different levels of quality, and there's a difference between commercial and consumer products.
Some of the consumer products are pure silicone and some are not. One way to tell the difference is to twist or fold the pan. If any white shows through, it's an inferior pan with fillers added to the silicone.
I did not test any restaurant-quality bakeware. My research and interviews indicated that it's several times more expensive than the consumer bakeware, even thinner and floppier and often not sized for home ovens. However, it tends to have even better nonstick qualities than the consumer bakeware. One chef raved that he never had to grease his Demarle molds. The chefs I spoke to were uniformly positive about silicone.
Consumer pans nearly all need to be greased. I used oven spray and had no problems with clean up.
You do have to get used to the floppiness. A baking sheet under the pan is essential. (And if you succumb to the adorable
Silly-Feet! cupcake pans, you might even want to put them in something deeper.)
For more silicone comparisons and tips, see
Sizing up silicone.