do you have the t50? i see it has light sensors.I've had the Run Chicken for 2 years now and love it! As Perkolator said, the only downside is the manual door button that a racoon can access - and one DID in my case. My door is installed on the run attached to the coop, so I solved that issue by installing the door on the inside of the run (keeping the manual operation button protected when the door is closed). I like that setup better also because it is a little darker in the run, so the door closes a little earlier. I usually go out and close the door manually (unless I'm out of town), but the automatic opening in the morning is worth the money alone! Good luck!
can you also set the time manually to a time of your own choosing?
also does the safety sensor really work? what chance of a headless dead chicken?!