Overall, I love this bottle. I have three problems with it. First, when I shake the bottle (to add some flavorings or so), and then push the spout release button, liquid goes all over the place. There are a couple workarounds, so this is not a real problem any more.

The second problem I have is that because of all the nooks and crannies in the mechanism, it is very hard to clean thoroughly; there are some hidden places where dirt starts accumulating. Eventually, the only option is to replace the bottle; I may end up going back to a simple old-fashioned water bottle for this reason although I love the AutoSpout feature.