Product review (5 stars): Cheap, Small, Effective, High Flow - Awesome!
This water filter is surprisingly good. It's easy to attach (comes with different thread adapters and washers), simple to operate, the flow rate is impressive, and it works.

I've had this since July or August when I got my city-sponsored lead test results. Our water tested at 11ppb after standing overnight. They offered a re-test. With the water running, our water went down to ~5ppb. With the filter, it went down to 0.55ppb. There's no chlorine or anything else added to our water, but I imagine it would help with that too.

The only two downsides are this:
-The tubing is semi-rigid plastic, and routing it can be tricky. It can knock stuff over. If it were a little softer, it would be easier to position, but probably wouldn't work as well some other way.
-The switch on the aerator is spring loaded, which is fine ... but lately it's been sticking. I imagine that the pin you pull is slightly bent, so it's sticking instead of returning to flow.

I'll definitely buy another in the future, maybe the larger size. As is, I expect this to last another 4-6 months.

If anyone is wondering, it hasn't slowed down the flow from my faucet when it's not routed through the filter. That's my #1 reason for hating other faucet-attached filters (Like Pur), but not this one.