Thanks for reaching out !!! I've been running the 2.0 for about 6 months ! Heres my take on it. The light is high quality in terms of reliability & general reef lighting. Growth is not too bad, you'll keep some SPS alive such as stylos & etc. I will say that sadly, the 2.0 isnt enough to keep certain picky " light demanding " creatures alive however. I had 2 duresa clams die out on me, because the lighting wasnt enough. Its not all bad though ! Cause it will keep alot of LPS & some SPS happy & it will have them grow well ! .. all in all for the money, its a good light. Im actually going to upgrade my lighting just cause i want more complex specimen. For the button issue, its just that the button is touch sensitive. Its not a HUGE down side but it does get ANNOYING lol if your hands are slightly dirty/wet/anything the button wont recognize your touch so it will give you a pain. Nothing too crazy, just annoying !!! Other than that good light, not much to complain about. T5's do you a good favor though !!! Helps you with more spectrum/light intensity