Camping Survival was nice enough to send me a lifestraw to check out. It is a pretty neat little product. Very simple and priced around $20 so you can have one in the car, another in a kit, a third in your EDC type bag or whatever. Also they weigh like 2 ounces which makes carrying one an easy decision. They are a bit long but they are thin enough to easily fit just about anywhere.
The Lifestraw was designed for disasters and such in the third world so they are simple and easy to use. There is really nothing to break unless you crush the thing or light it on fire. They are said to be good to filter a thousand gallons of water.
My concept of use for this item is for outdoor trips, short term emergencies or as a backup to another system. I will fiddle with it some more and do a full review in due time. As of right now it's place is in my HPG Kit Bag.
If you are looking for a light and affordable filter the Lifestraw seems like a solid option.