Like you, I won't be buying anymore from them. I have the mag tester, but new reagent that originally had a packet of power that was replaced with a liquid and new testing instructions that require two more reagents. Bait and switched.The hanna alk test is useless. As soon as the reagent bottle is opened the test will start become inacurate. After spending so much money on the alk and calcium tester from hanna i will not be buying any of their other products. I don't have anything to say about their magnesium checker if its accurate or not but the failed launch doesn't give me any good feelings about it. I like aquaforest for mag but many others will be just as good.