I bought this battery-operated lock set about 5 years ago. painted it bronze since it was not available in that color. The lock works great. I especially like the auto lock feature, where it locks itself in 30 seconds, just in case the lock was not engaged. I could not beat the price, about $100 when I bought. Battery life depends on batteries and usage, but typically last us about 6 months used several times daily. Had minor issue about a year ago where the battery holder had corroded connections, but I used sandpaper to clear and back to working great. I disable the blinking light to prolong battery life, which helps. I change the combo every 6-7 months, which takes about 3 minutes. A recommendation would be to have an on/off switch so I can disable at night or for vacation. Still, a great product.