Others say...

"great product, fast shipping"
these work just like advertised. my wife is thrilled that she doen't have to go out and buy cupcake liners all of the time.

"Wow!"
I rarely bake muffins, but had the opportunity to try my cousin's at Christmas this year. LOVE them! Non stick, sturdy, and excellent! Best part is that you set them on cookie sheets to bake, so I don't have to keep a bulky muffin pan around to be able to make muffins or cupcakes every now and then!

"Good replacement for paper cupcake liners"
These are a good replacement overall for paper cupcake liners, but they do have a few quirks.

I noticed that they did shrink a bit after the first use and subsequent dishwasher wash. The initial use, nothing stuck to them at all. In later uses though, with the corn muffins for which I was using them, some sticking did occur, usually on one bottom corner. So after that I would spray them with non-stick cooking spray before use.

They can be a bit tricky to clean as well. Though they are dishwasher safe and generally clean up well that way, on occasion some material would remain lodged in parts of the ridges after a dishwasher washing, and that required spot cleaning by hand.

"It may still stick..."
I am a big fan of silicone bakeware within its limitations. I thought these would be really great, and they are from a storage perspective and muffins/cupcakes don't stick but...if you leave them in these cups until they are totally cool, they will start to stick, so you don't really want to serve them in these even though they're really cute. :(

So, you take cupcakes out of the silicone cup, and then because they are so small they get dry really fast. If you were making a regular cupcake or muffin you would either put it in a paper liner that would hold some moisture in, or you wouldn't use a liner and the sides would be smooth so there isn't as much surface area to dry out.

Also, how do people wash these in the dishwasher? I can't find a way to do it that wouldn't have them falling down and being tossed about.

Cute and fun if you are making cupcakes or muffins that you eat immediately, otherwise I'll stick to individual foil cups or paper liners, or maybe try some of those silicone cups that have smooth (not pleated/fluted) sides.

"handy, space-saving muffin cups!"
These muffin cups are better than I expected: they're so easy to use and clean that I find myself making muffins more often than before! For people with smaller kitchens, the size of these muffin cups is a big plus too. As other reviewers have mentioned, you can just throw them onto a cookie sheet and make an impromptu muffin tin. Fantastic!