eufy 5-Piece Home Alarm Kit

I purchased this alarm set to replace the old ADT alarm set in an older home. Installation of the sensors was simple and quick. I mounted each set of sensors with the sticky glue pad and also secured them with the provided screws due to the strong magnetic force pulling a magnet to the nearby sensor in proximity. For reliable connection, I chose to connect the home base to the internet using the provided Ethernet cable. I installed the keypad on the wall along a hallway next to a protected receptacle with USB (see attached pic). I read the instructions for each of the devices a couple of times which were clearly written with illustrations, then I followed the instructions to the letter for step-by-step installation starting with the home base, the keypad, and lastly the sensors to get them all working together before actually mounting the sensors. The whole process of installation was simple, I didn't encounter any issue (such as firmware update, and dead batteries) described by some reviewers. The alarm set has been working as expected since it was installed. By default, the home base will notify you of all open and close events detected by the sensors, which may be too much for some folks. However, the controller app, which is easy to navigate, would allow you to customize the settings for each of the sensors to minimize or turn-off notification completely. You can choose "Home" or "Away" mode either by using the app or by using the keypad, which will require validation with the PIN first. 12/12/23 Update: An update of the Eufy Security app on my mobile device sometimes last week causing the following issues: 1) I couldn't open it, it kept crashing, 2) The annoying warning "This accessory is not supported" kept popping-up, 3) whatever the app was doing, it caused the battery to drain fairly quickly, I had to recharge it multiple times each day, I never had to do that in the past. To fix the crashing issues, I had to delete the app then reinstall it from the Apple Store. Reduced 1 star for poor quality app.