I have tried other filter-bottles before, but this is, by far, the best. Though, at first, I thought the cap leaked, it turned out that I had not aligned the filter in the cap quite right (so far, so good since then). The water tastes just like the water from a Brita pitcher filter. The bottle is also easy to drink from, easy to hold, made of nice-feeling (not rubberized/coated) flexible plastic, and is - visually - aesthetically pleasing.
My only wishes are for the protective cap for the mouth piece to be attached (I am always afraid of dropping/losing it), and for there to be a light weight sleeve and shoulder strap available to purchase for it (generic sleeves do fit, but they are so bulky/"insulated" that they are impractical most of the time).
I have owned this bottle for less than a month and have used it, very happily, almost every day.
Thank you, Brita, for designing such a wonderful water bottle.