I just switched over to the Elos kits, and I think they are extremely easy to use. I would highly recommend them. I was using Salifert before that, but I got a little turned off by the lack of support when they had all those bad Alk kits. With their forum here now gone, that just made the switch even that much easier. I don't like to reward companies that have poor customer service. But, their test kits that were not bad did work and were easy to use.