As stated in the title, these baking cups are excellent!! Here are some reasons why I highly recommend them:
1) Very easy to fill them up, simply spoon in the desired amount. As with all silicone baking products, set on a hard surface such as a baking sheet or baking pan before setting in oven.
2) The muffins come out looking perfect. I filled some cups about 2/3 full and others almost to the top and in both cases they came out perfect.
3) You dont need to grease them at all! However, do let the muffins cool before removing. If you dont they will still come out ok, but if some fruit leaks to the cup than it sticks a bit. Letting them cool a bit before removing will ensure that they come out perfect.
4) Very easy to wash. Soak a few minutes in water and scrub ever so gently and voila, they clean perfectly.
5) Oven, feezer, microwave, and dishwasher safe.
6) Come in a range of colors so you can mix and match.
7) Individual cups that stack so they dont take up any storage space compared to muffin pans.
8) Note that they are very high quality, made in france of 100% silicone. This is probably why they seem to be a bit more expensive than other silicone muffin pans/cups that are not 100% silicone. I dont know what other substances are used in the ones that are not pure silicone but after reading other reviewers complaints about "strange smells" coming from these products during baking, I dont care to find out.
9) Silicone is a great alternative to non-stick teflon. There are reports claiming that Teflon emits dangerous chemicals not just if the surface is scratched but also when cooking with it at high temperatures (that are generally reached during the cooking process).
I was previously using the Le Creuset silicone muffin pan and was very pleased with it but it was discontinued. I didnt want to get these individual muffin cups at first because I thought they would be more cumbersome than a pan, but was pleasantly surprised. Not only did I not find it cumbersome, but the fact that the muffin cups are individual allows you to pick them up one by one and fill them very easily and with no mess. And as already mentioned they dont take up any storage space. Plus, the muffins came out even nicer than with the previous silicone pan.
Give them a try, I dont think you will be disappointed!