Im very intrigued by the Katadyn Befree water filter filter, but would like to hear a long term review from a thru-hiker. I know these are fairly new and most of you had already bought your filters before theses came out but.......Are any of you thru-hiking this year using a Befree and if so how is it preforming? I would like to know if the flow has slowed down, any failures or anything that effects the filter in a negative way. I know there will be a few of you whom have just bought it and would like to give your input, but really not interested unless your thru-hiking with it (real world stuff) Thanks and happy hiking!