I received this cold brew maker as a wedding shower gift. While I love it conceptually, I didn’t realize that it made “concentrate”. I started using 1 and 1/3 cups of coffee grounds per batch to allow for 1:1 ratio blending instead of 1:4 as recommended. This is working well and a lot easier to figure out in the busy morning. Can’t speak to the longevity of the quality but seems really nice overall. Sleek, effective and seems high quality.