This has become our primary entry to our home. When we take dogs for walk, go to neighbors, attend block parties we close garage door and carry nothing-able to input our code and go thru garage door. Awesome! Only negative is no battery backup for operation of garage door (AA battery simply maintains code)…lesson learned during power outage.For years I used the Craftsman keypad that's equivalent to this. It was fine and a huge improvement over not having anything. But this LiftMaster one is much better and here's why. First it's much cheaper. This may sound obvious, but I was shocked to look into buying extra remotes for the Craftsman system and to find they were so expensive. Liftmaster seems to be much less in general and that just gives you more options. The big functional improvement for me is when you type a bad code. With the Craftsman I had to stand there and wait several seconds for it to blink letting me know what I already knew, that the code was wrong. With this opener, if the code is 1234 and you type in 1264 you simply need to just keep typing (1234) and then hit enter. In other words it's only looking for the last four numbers you typed. That's a huge improvement. It's especially nice at night where it's not a problem to type a random number just to get the back light to come on. There are also some fancy features about temporary and alternative codes that the Craftsman didn't have. And finally, the cover of my Craftsman was very poorly constructed and came off right away and I had to just hang it there. This one seems a bit better designed. Both the Craftsman and the Liftmaster could use better buttons. The ones on both units are mushy and can deflect laterally when pushed leaving an ambiguous sensation of what you just entered. And with both units I was concerned with the batteries getting stolen. If you think you want a garage door opening keypad, I highly recommend you get one. And if you have a choice, this one is pretty good.Although these instructions are actually contained within the several different instruction sets shipped with the device, THESE WORK. I tried them more than once, programming in several different codes to test the instructions.1. Get your stepladder out and set it up.2. Find the side of the ceiling-mounted opener drive motor cover. Remove the cover to reveal the plastic button marked "Learn." On my unit, it was square, red in color, and slightly recessed in the wiring panel on the side of the motor.Be prepared to execute the next instructions quickly. I suggest you have the remote on the ladder with you.3. Press the "Learn" button until the small light next to it illuminates. Should illuminate immediately.4. Enter the four-digit code you want to use, then PRESS AND HOLD THE "ENTER" button on the remote.5. The incandescent light bulb(s) on the drive motor will flash a time or two, indicating that the drive unit has accepted your programming.6. Test your work by operating the door using the remote.7. Mount your remote outside your garage according to the supplied instructions.Good luck.I bought this for my new to me house this week, so I wouldn't get locked out. The previous homeowner left the owner's handbook to the installed Liftmaster 2245, so I was able to find the proper accessory unit to order. It was easy to install, just climb on a ladder to push the orange/red learn button, enter a new pin on this pad, press enter, screw to exterior wall. My only complaint is changing the pin un-program the existing clicker in my car, which I learned when I came back home after dark(sigh). The handbook that came with the key pad didn't mention you need to have this pad in your hand to reprogram the old clicker. I had to go find the owners manual to figure out what to do (recommended steps below) I was alone so I had to unscrew the wireless opener, go back in the garage, put the new pin into the wireless pad, hold in the enter button, while at the same time holding in the lock AND the light button on the wired opener inside the garage until motor light blinks. If you have the same opener I hope that helps. Other than missing this key step, it was easy.I have an older model Chamberlain WD922K opener. The "940 CB" keypad was what originally was installed when the opener was put in, but it stopped working after several years. I read the reviews here and the review by "Ken in Denver" was very helpful. I purchased this unit after learning it should work with my opener with an orange learn button. It installs in just a couple minutes. I needed to drill one new screw hole (the holes are not in the same place as the old one) but the unit covered the old unused hole so it looks fine. It comes with a battery, but I put in my own alkaline 9V battery instead. To get it working just press the learn button on the main opener then enter the four digit code you want + "enter" on the keypad, then wait for the light to blink. Couldn't be easier. It can accept a temporary password if needed. I've had it about 6 weeks now and it has worked in the cold of winter, so I'm sure it will continue to work as it warms up. If you have a Chamberlain unit with an orange learn button that is in need of a new keypad, this should fit the bill perfectly.The house came with a similar Liftmaster unit. It was getting a little flaky after six years in the Houston mid-day sun. I figured I would stick with anything electronic that can survive in this environment.The new one is extremely nice, but be aware of something mentioned in other reviews. You have to program it with the door DOWN, NOT UP. It has a nifty feature: It requires the code to open the door, but you can just press Enter to close the door. It seems to do this by keeping track of whether the door is up or down. If you program it with the door up, then it thinks up is down and down is up. In that case, you don't need the code to open the door, but you need the code to close it. What was that saying about horses and barns? After you program it, be sure to check that just pressing Enter does not open your door.