Top quality
I researched a good bit before deciding to pick this brand. When you look at what all it removes and the life of the filter, nothing else comes close. Like most every product, there are a few things that could be improved. When trying fill a container from the spigot, very often the flow is extremely slow, that is due to a tight fit between the upper and lower tank, so not enough air. I have seen a nice mod where a person ran a piece of plastic pipe up from one of the filter holes to the top of the tank, while that will likely help, I found that putting a short piece of a cheap drinking straw between the 2 tanks fixed the problem, it does smash the straw flat, but it still leaves just a tiny space for air to get in and still keep bugs out! Something as simple as a piece of fishing line should work just as well. The other glitch, you have no way to see how much water is in the bottom without removing the top tank, I have found an accessory though for another name brand, that should work, it replaces the spigot with one that has a tall site glass.
I believe the MFG could do something as simple as put a small indent on the top lip of the bottom tank to keep it from being air locked(slow flow)
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