I have never been too impressed with pump filters, chemicals, or the new uv options. I just though there should be a cheaper, lighter, more effective way to treat water.
Sawyer makes their products with different ways to effectively use their filters, which is great. With the size, you can hack this into an inline filter without some ridiculous additional weight. I assumed the straw would be tough to drink though but i find it easier then the Britta "in bottle" type filters. The squeeze bottle adds yet another way to effectively use this 3 oz (wet weight) filter.
For the price i am extremely happy with the weight, and effective options with this unit. I am excited to see how this holds up over the 100,000 gallon limit!
edit:/ i recommend getting the larger squeeze bag, it is time consuming filling at a shallow water source with the smaller bag.