Nope the settings have stayed rock solid. The only part that takes getting used to is the input of the settings. You have to follow the same steps each time. So you are repeating each step over, and over, to setup an entire day. He shows the steps in the video and makes it look easy because he does it all the time. My first time setting up a program was a bit frustrating (old guy) LOL

Would be a big improvement if instead of the drag and drop, they used the little "wheel" things you see on lots of programs. For example if I was trying to set 12% on a particular channel, for multiple time periods, sometimes you end up with 13% or 11% because the dragging and dropping is a bit challenging to control with precision. But in reality that 1% doesn't really effect the output that much because of the 0-100% range. I'm used to it now and have several programs loaded onto my phone: coral acclimation, fish acclimation, algae reduction, normal, etc. Very easy to switch back and forth. Hope this helps. The light is really solidly built. When they ship it, it comes in a carton that is so carefully and strongly packaged, you could drive a truck over it and I seriously doubt there would be damage.