I've used it. Its a lot of mixing. Like 5-6 bottles I think, and that's not even the entire line. For me ot works better in coco because of the high ppms. When I used it with ammended soil, like OF, the run of ppms in mid flower would jump over the 3k mark and I'd have to flush. If you are using ammended soil, use 1/4 to 1/2 of the recommended dosages. Its a grood product. But regardless of the nute line I'm running, always flush with HH, use Athenas Aminas and the calcium one that starts with a D. Lol.. Bloom Kaos is liquid crack as well. If used at half strength, amd depending on your set up, hat sample box could last a long time!