Only a week into owning/using the Osmio Zero, so can't comment on filter life, but the water quality is excellent, it's fast to heat up, the flow rate is good, it's easy to fill up the main tank and it's large enough to not have to do that too often. The size of the internal tank means that the filtering process isn't really noticeable as it takes place in the background with filtered water available when needed. It's a good looking unit too. Osmio have been quick to answer questions and answered them in full rather than just simple yes/no. Happy with every aspect so far.