One of the best buy’s I’ve made on this site. owned it for two years now and it still works great! No problems in the winter, still haven’t changed the batteries and works fine. this was a nice buyWe bought this lock to keep the kids out of the office, so we needed something convenient, fast to use, and only relatively secure. We didn't expect to keep out burglars. This lock works perfectly. Here's why:1. The fingerprint reader is fast, reliable, well-placed, and easy to use. We have another fingerprint lock elsewhere which requires you to hold your finger in exactly the same orientation each time. This one is much more flexible. While it won't work if your finger is even a little bit wet, most of the time it works very well. I do believe that if you add too many fingerprints it can slow it down, but I have a good six or so saved and it works well.2. It looks good. It's true stainless steel. Even many of the screws, even interior screws, are stainless. You can tell because they are not magnetic. It says something that the manufacturer did not cut corners on the screws. The entire lock looks tough and professional.3. The battery lasts a long time. I've had it for about half a year and I don't think I've ever had to change the battery. Nevertheless, there is also an exterior micro USB port that can be used for powering the lock if the battery goes dry.4. It's versatile. There are keys for unlocking it if you want that option (the keyhole and charging port are hidden behind a little plate). You can set it to stay unlocked when you don't need it locked. You can program multiple users and multiple passwords alongside multiple fingerprints. You can also download logs that indicate when each user accessed the lock, but I haven't actually done that. You can also turn on and off the various beeps that it makes. Lastly, it's set up in such a way that it's easy to unlock and open the door with one hand when you're carrying something.The instructions aren't great, by the way, but it wasn't too hard to figure it out.Now, one little problem: my kids broke mine. They sometimes try to get to me by hanging on the handle, and today it finally broke inside. At first I couldn't even get back in, but being forceful I was able to click it back in place enough to open the door. I was also able to fix the problem inside it--it was tough, not something most people can do. From there it was clear that an internal part had been bent by the kids' misuse. I don't hold this against the manufacturer, though, because the inner components were sturdy and comparable in quality to other, big-name locks. The bent component seems to be from misuse, not poor construction. I sincerely doubt that any indoor lock would be entirely impervious to my children.I definitely plan to buy AIGURD again in the future.This is plenty serviceable but has issues. Software is old and not compatible with my phone. Keypad is almost unreadable in bright light. Good at immediate lock which was the biggest reason to get the lock. There are better features on the market but this does the basics pretty well. Uses AA batteries as power source. The physical backup keyhole is difficult to access and once accessed, too easy to see where it is. ? Camouflage panel does not reseat easily. Can program to where code and fingerprint are required to open. Code MUST BE 8 digits.We used this lock on the back door of our business for over a year with no issues. Yes, it is very hard to read in bright sunlight so we just programmed it when the door was in the shade. Adding and deleting users is very easy. After a year of use, something inside the handle mechanism broke and would not work. I emailed the manufacturer and they answered me within 1 day. After a brief explanation of the problem and proof of purchase, they sent me a replacement lock at no charge. The new lock is working fine. I'm very happy with their product and customer service and would buy again.I like the looks of this lock. Of course, that is always the most important. We just installed it which really wasn’t that difficult... but when I read the directions on how to set it up I almost wanted to cry. In fact, after trying to follow the direction my husband had to uninstall the whole mechanism so I could get to the reset button. I enjoy trying to figure things out on my own and wasn’t going to give up but YouTube was a life saver. After a short video I was able to set up the lock with no problem.. If you get this lock just watch the video.I have used the lock for 3 weeks. Not a long time, but it is sufficient to write my first review. First of all, it works well for me. I feel satisfied very much. Now, I give it 5 stars for easy installation (I need to drill my door one time), build quality, and the simple setup process. It is my first fingerprint lock. The fingerprint reader works perfectly for me. But, it failed to read my wife fingerprint. I will try it again this month. So far, she still uses the code to get in which works flawlessly. So, we are happy so far. I didn't test the waterproof function because it is in my garage. the handler feels sturdy. I will update my review after one year of use!This product is wonderful! It only took my husband 2 beers and about 30 mins to install. I love not having to worry about keys. Did I lock the door? Did the kid lock the door when he left? I have a package that needs to go in the house but I'm at work, what to do???? All those questions and MORE are answered with this. I have already recommended this to my father, father in law, and anyone who will listen. :) You will not be disappointed with this purchase.I ordered this lock for my VFW Post. The lock is of high quality heavy stainless steel case, solid handle easy to set up I installed it in with having to drill one small hole above the existing hole from the old standard knob door lock. Also, it's easy to use. Here’s hoping it will serve us for years to come.