I Have JBL test kits for my freshwater tank and find it excelent, I have aquarium pharmasuticals tests for my saltwater tank and they seem ok but i haven't ever tested with 2 tests to check accuracey
I also have JBL dab sticks (does PH, KH, GH, NO2, NO3 & NH3/NH4 on one stick) for my freshwater tank, These are expencive and very unaccurate I use them for a general idea of how things are going if I am too bussy to do a full set of tests