Nifty gadget, especially for the price. My creaky 1995 garage door opener is now cellphone-operated and notifies me when it's going up or down!I admit I was skeptical -- also ordered a keyfob controller just in case it didn't work. But so far it's great.Took me about 45 minutes to set up while *carefully* following the instructions. Having done it once, I think it really should only take about 15 minutes. But no point rushing.You can test everything is working before you mount the boxes -- it involves a couple button presses and a cellphone to log into a website. I was worried our Wifi wasn't strong enough in our detached garage, but it is apparently good enough (despite the app warning me it was weak).Once things are working, you just need to mount the two boxes, which is easy. You wipe down a spot on your garage door, velcro-tape one little box to that; then drill two holes into a wall or post, mount the other little box with 2 screws, and plug it back in. The boxes are quite small and unobtrusive -- except when the door is about to go in motion -- then the main box beeps and flashes bright LEDs to warn you to get out of the way of the door. Our garage door rattles like crazy but that doesn't seem to be causing any trouble.Other reviewers have complained about a subscription fee, but I do not believe there is one at this time for using it standalone -- they never asked me for a credit card so I don't think there are hidden fees. I believe the fees come in if you want to link it to some online smarthome services, and I have no interest in those. If that turns out to be wrong I'll edit this review.Definitely one of the more satisfying little gadgets I've set up in a while.