Bests & Worsts Reviews from Amazon

So I tried to buy this used from Amazon Warehouse, bad idea. Really bad idea. Until a future update is pushed out these are locked to one account forever and can't be reset for a new user. Kind of pissed Amazon even wasted my time by selling it to me. Chamberlain's customer service was really kind and understanding but didn't mince words about me not being able to use my used unit in the immediate future. So I got a new one and had it set up and working in under an hour. The guide is very specific about how to set it up, and you really need to follow it if you want to avoid any hassle or trouble. For instance. The sensor unit needs to go on the top panel of your garage door. No ifs, ands, or buts. And the hub unit needs to be mounted very near where the garage door stops when in the lifted position. I like trying to use my own easier configurations all the time, and I really hate heights. But after messing around with some ideas that didn't require me to get on a ladder I decided to play it by the book and now it works perfectly 100% of the time. Seriously, everything the little quick start booklet says needs to be followed as closely as possible if you want this to work properly. Two bars of wifi, cieling mounted hub unit, sensor on the top panel, all of it. My one mild complaint is the seemingly excessive safety measures taken when you close the door. The alarm is, well, alarming. And the flashing lights tend to frighten people who aren't expecting them. I've seen Craftsman smart garages that just close like normal. I'd really prefer to not have a small light show announcing my door is closing every time.