Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fast, easy, but fragile

My first experience with the Steripen was on a canoe trip with a crew of Boy Scouts in Algonquin where there is clear water everywhere, but it needs to be treated. One of the challenges with scout trips is that everyone wants their water to be treated, but they don't like the taste of iodine and hate the work involved with pumping. The Steripen solves both of these issues!It's really only effective for locations where the water is fairly clear to start (ponds, lakes, streams). As others have mentioned, is not poluted with chemicals or oil (urban flood water).The only down-side is that the unit is quite fragile and I've already broken mine once. Fortunately, a replacement bulb can be installed for $27 by the manufacturer. But, if you break the bulb on a trip (like I did), or the batteries die on you (which has happened too), make sure you have your iodine tables as a back-up.