It is hard to review when you haven't used any yet. I have taken one out of the box and it looks okay. I don't know how good they are yet or good they fit my furnace. If I think that they are that good, I will not buy anymore.
The purchasing process was easy. Selecting which filter I needed was excellent. All the filters were grouped separately and it was easy to select the right one. The process was quick and effortless.