Installed mine yesterday. I ordered mine on a Tuesday and had it by the following Saturday, which I think is pretty good; however I'm also in Ohio and it came from Indiana. I only researched these things very minimally, but I couldn't find a more reasonably priced unit anywhere else. The installation was pretty straight forward. Mine took a bit longer to completely install since my coop is three years old and I had to deconstruct the interior wall panels, and remove the insulation, then install the unit, and reconstruct my interior wall panels with cutouts for the automatic door. Total time to install was a little less than three hours. I noticed the same issue as dbounds10 the door is easily slid up from the outside. My guess is there is no way to avoid this since the door needs to slide easily in order for the motor to pull it up, and let it down. My run isn't so secure (it doesn't have a top) and my biggest concern is racoons, so I could have an issue. I installed it because we are going on vacation in July and I didn't want someone to have to come let the chickens out in the AM and return to lock them in again in the PM.
While in general I'm happy with my purchase and would recommend it, I do have complaints. I am only moderately handy, and anything electrical is not my best friend to say the least. There were absolutely no written instructions included with the kit, aside from the timer. While the installation video is very good and quite helpful it's not very convenient when you need to refer to it while completing the install. I can't use my laptop in my chicken coop, so I had to come back inside to reference the video once, which obviously added to my install time. This morning I got up and all my chickens were outside, and all was right with the world. That being said, tonight I went out to check on the door to be sure it closed at the scheduled time. It didn't. I fiddled around with the timer for 45 minutes and still can not get it to go down at the scheduled time. I followed the timer instructions which refers to turning on/off a lamp. Unfortunately turning off the door does not make it come down. I tried every configuration I could think of on the timer, but to no avail. Thankfully I happened to have a higher quality timer on hand, and I believe that is doing the trick, but only time will tell if I actually have it fixed. I haven't contacted automaticchickencoopdoor.com to address this issue yet. I was actually looking on here to see if anyone else had the same problem when I ran across your thread. Hopefully my experience can be somewhat helpful to you.