I have 20cm ones; use them for quickdraws. They are super light and thin, haven't used them in ice and snow, but still easy to use in lots of rain. May be too thin for fast sport clipping, but I will be buying more in the future to extend some of the standard draws. If you are concerned about weight, these are great.
I use this for changing the rope on craigin routes. light and low profile. I prefer a wider daisy for aid because this one will cut into your hands after hours of pulling on it. When will BD start making a full strength looped daisy? That's what i'm waiting for:)