I tend to use a windows browser for setup.
The only major problem I see is the disable/enable button in the water schedule, it does not work and it's been this way for a long time. The same style button works in the various Smart Cycle and Weather intelligence sections so it seems an easy fix.
I have been deleting schedules to disable watering but that's a bit tedious. I have a complicated system with never ending maintenance so the disable function is very useful.
I have tried the disable function in both Firefox and Windows IE, does not work in either.
The disable function in the My Yard section does not work either (hangs when I select disable) but either one would be satisfactory.