I am not impressed. Yes, this keeps the computer from sleeping just as it advertises. But even when I uncheck the NoSleep function, or quit the app, my computer will not go to sleep now. I have uninstalled the app, still, my computer is stuck in NO SLEEP hell, refusing to sleep even if I use the Sleep command on the Apple Menu.
I too think this is garbage ware. I like the idea, and it was helpful when I wanted it to stay on a few times, but if you can't turn it off, and it wont go off even when turned off, then it has a major problem.
Now, my computer refuses to sleep, forcing me to shutdown every night, or leave it on until it kills the battery.