Product review (5 stars): Great Filters for Me.
They work,... the water tastes great, the flow is good, the replacement went in well, the dual rubber grommets seal well. Much cheaper than the real Samy ones. They look to be built solidly.

To some extent I have no idea if they remove heavy metals or fine particulates, I don't have a chem lab at my house to check.....but honestly my water isn't bad to start with. If I knew I had something that worried me in my water I'd care more. So for me these guys are great.