I did not see a reviews section on the forum, so, figured it would post this up here. Feel free to delete or move it if this isn't the right spot

We bought and installed a "Ladies First" automatic chicken door for our coop and it is great (or, at least appears to be thus far). It runs off standard rechargeable AA batteries and comes with a solar panel to keep them charged - but the thing I really liked about it, is that the door operates on a screw drive, which means wily predators like raccoons cannot just slide it up to get into the coop (other brands I found simply pull a string up to raise the door - not secure!!)
The solar panel itself is also what controls when the door opens and closes, so it closes naturally based on light levels (just like chickens head in to the coop naturally as the light levels fall)
The door is...well, what most would probably consider to be insanely expensive, I think it was $269 for it with the Canadian shipping option - but I don't regret the expense at all, they are made by a small business in the US and it is a quality product.
Installation was super easy, it comes ready to go! All you have to do is hold it level, screw it in place (the four mounting screws are pre-set in the frame and ready to drive), then connect the solar panel and override switch, drop in the batteries and that's it! It's also made of aluminium and pvc so it will stand up to the elements over time, and not rot out or rust.
Anyone else use an automatic door? Post up your favourite brand!