Some people worried that the end would not do a good job breaking up lumps of mica, but let me tell you - this thing is a powerhouse. I have to be careful not to fling stuff all over the place. And I have never had a problem with mica that is not fully dispersed.
I use one of the other frothers with the spring end when I make 100g batches of lotion, since my SB can't handle such small amounts.
Can't remember where exactly I saw it (think it was a "Soap Queen" video) but the person doing a swirl technique video used one of the coffee frothers and said that she has no problems with them when she mixes colors in vegetable glycerin.