I had heard about chicken door openers and came to Amazon to search for one. As I was scrolling through the products, I found this one. To be completely honest, what drew my attention to the product was that it was cheaper than the alternatives found on Amazon. I know cheaper isn't always better, and so I emailed the seller some questions about its quality and durability. I was pleased and surprised at how fast they got back to me with answers.My two concerns were snow and daylight. I live in a part of the country where we get snow, and I was worried it might not deal with colder temperatures and snow. Second, my coop is in a part of the yard where it gets less light. So, I wasn't as much worried about it opening early (or late) as I was concerned about closing early (before the chickens were ready to come in). I saw other products that had timers and/or day and night sensors, but very few adjustments.What intrigued me about the response from the company was that this was built and tested in cold environments so there were adjustments to deal with snow and daylight without having to constantly adjust the product or a clock or a sensor. Given Amazon's return policy and the company's quick and thoughtful responses, I decided to give it a try.The package arrived quickly; and not that this matters too much, but it's in a really cool enclosed design. So, everything was protected and ready to install. I half thought about using the shipping box as part of the attachment for the coop, but I realized it wasn't pressure treated. You'll see in the picture and video from the company that they install it on a wood chicken coop. But I have a TS wood+wire one. So, I took some pressure treated wood and created a panel for the door. On the back side, I cut a hole in the wire and then stapled the wire to the back of the frame. Outside of the time it took me to cut and paint the pressure treated wood, I would say the install took 20 minutes.My chickens took a day or two to get used to it, but it worked great. My problem was that one chicken kept staying out later and kept getting locked out. So, following the directions, I just turned the knob (what they call the "potentiometer" a quarter turn) and it was stayed open a little later--enough time for my late chicken to come home. Easy adjustment. The last few days, we had some snow. And again, it worked great.All in all, I only had one problem that is more of a design flaw for me on where I put the door. The door faces west and so I get a lot of snow/rain blowing in. On days that are warmer (above freezing) and then colder at night (below freezing), I did have the door freeze shut (e.g., I went out in the morning and it wasn't open). Again, enter the designers. They created dip switches to manage how much power the door gets. They recommend for slow/low motor to protect the chickens (think French guillotine). But, I had to move it up to high so that if that did happen, it would break through the little bit of ice that formed.Overall, I would recommend this product and would purchase it again. The company is really good on responding to questions. For the record, if you go with this product OR any chicken door, and you live in the cold, think about door placement as almost all roofs won't protect rain/sleet from getting in the door slot. But, again, I think the dip switches on this model help with those issues.