I like mine, and they stop the climbing "explosion" of HEED that I get with other bottles. With other bottles, the unused one on my seat tube seems to pop and spray HEED on my frame at some point in my climb, from the change in altitude. With the camelbak bottle, I keep it closed and when I am ready to use it, I point it away from the bike when I turn the ring. Note, this is only an issue when I have gained a couple thousand feet, but that is on most of my rides.