one use, gasket broke...

the o-ring doesn't seal at all, so be prepared to lose a gallon or more of beer for 5G transfer. The thread is non-repeating so the o-ring will get pinched at some spot no matter how well you align it or how well you tighten it. I did several transfers and really tried hard to tighten the plastic top as hard as I could, but it is still leaky as hell.

Fantastic. This will help me in my small operation with limited space.

This is just a big plastic cannister - filter block sold separately. Also remember that this thing has 1/2" FPT connectors, so don't forget to add two more quick-connect devices of your favorite type to your order.

I've been using mine for about a year or so, fairly regularly, as part of my pre-brew water treatment plan. I have chloramine-treated city water, and have been told that running slowly through a carbon-block filter will get rid of most of that, plus my downstairs water tap sometimes spits out rust (rental housing, what can you do?), so this helps on both fronts. The O-ring still seals well, the only drips I ever get are when I forget to seat my quick disconnect hose properly (or if I forget to open the valve on my brew kettle before I turn on the water-- woops!).

It's solid and durable enough to put up with mistreatment. Mine's usually flopped around, loose, between my sink and brewpot, so it falls over all the time.

Works well. I use two inline to filter my water. I smashed an oring once by being careless, but have never had any other problems.