sorry jack been busy, they work really well we first used it only on a couple of aks the buds was a little sweeter and the plants had a stonger smell to them but the high is cleaner,and this xmas i used the bio boost on a stawberrycough plant very nice overall i would say they are worth using,rite now im trying a new one to me called green sensation i will let you know the out come ,good luck:thumbsup: