Bought this for both of my saxophones (tenor and bari) after several recommendations from youtube saxophone channels.
It's a very simple item, the build quality is fine for the price. The idea of taking care of my instrument and preventing issues really speaks to me. It does what it promises. I expect it to prevent stickiness of the pads in the future. Some people might find this item to be expensive for what it is, however, saxophonists spend hundreds to thousands of euros on instruments and education, making this a relatively small expense (you only need one per sax, or you could even use one set on multiple saxophones).
I recommend this item for any saxophone player, to prevent an annoying issue.