It might screw you over
The fatal flaw: the inlet connection nipple.
So I was filtering some very cold water (alpine stream, so it was snow about 2 hours before). It was only the second time I had used this filter. It pumps very easily and works great. Then I'm packing it away and when I remove the inlet tube, the connection nipple breaks right off, making the entire setup useless. I would have been screwed but luckily my friend had his filter. I think the cold water makes the plastic extra brittle. I was not careless, it just broke as I pulled the tube off.
My brother owns the same filter and a week later the same exact failure happened to him. He had to boil water for the rest of his trip. Luckily he had extra fuel.
You can read more stories like this in the reviews of REI. I am amazed there are almost none here on BC. This is a habitual problem with this filter.
I learned two things from all of this. 1) I now carry iodine tablets as a backup. 2) this filter is a bad trip waiting to happen. Invest your money elsewhere, especially if your water sources are cold streams and lakes, or you might end up as Zombie food. I now own the Katadyn Vario and so far it's worked flawlessly though it is heavier and bulkier which is a drawback.