An excellent bit of kit. Difficult to tell how well it filters as I've never been sick before or after using it.
There is definitely a taste to it, slightly chemically but it is barely noticeable and much less than most UK tap water (although in Glasgow we're a bit spoiled with good Trossachs water
). The only time it was very noticeable was when I accidently made coffee with water I'd decanted via the BeFree and it had a very noticeable impact on the taste.
Seems pretty robust, although I have heard you need to be careful with the cap hinge.