I like it. I wrote a review here, http://thesurvivalmom.com/2012/09/20/life-straw-a-portable-affordable-water-filter/
I actually had my daughter go outside and put some backyard mud in a drinking glass. We filled it with water, and I used the Life Straw to drink. Tasted perfectly fine.
So do you risk popping a vein as you try to suck water through the straw, like trying to drink a thick milkshake through a straw?