Only used it for a few days, but as far as I can tell it works fine.This product doesn't work every time. When you first plug it in it works. Then next day it doesn't work. If you unplug it and wait awhile and plug in again it will work 1 time and then not work again.I couldn’t get the timers to work properly. I’m not certain wether it was me or a quality issue.I have used those on my Christmas lights and they have all worked well. Appear to be waterproof and function as described. I believe it is a good value for the price. You can set them as being on or off or 2, 4, 6 or 8 hours on after sunset or dusk to dawn.I just bought this. We have an inside switch controlled outlet outside, but we either neglected to turn it on to light our decorations or would forget to shut them off when going to bed. I got this item, turned my inside switch on and plugged the unit into the outlet. Then just plugged in the decorations to the unit after setting it for six hours. The unit has several hour settings as well as a constant on. All of the hour settings is how long you want to keep power going after dusk. A photo sensor turns on the unit when it gets dark. I was worried the car head lights would interfere with the unit as I live on a busy street that curves right in front of my house, so headlights will hit it. The unit doesn’t react unless it detects continuous light for 8 seconds, so no problem!This is the best money I have spent for Christmas. It is the first time I don’t have to go back outside before bedtime to turn off the lights. I love it! And they can stay on a little longer!This item works perfectly for 1st time use. Then seasons change and no longer need to turn on early in the day. Timer kept the old settings even when I unplugged it from power. There should have been a reset button on this item I guess. I would buy the manual timers instead. It still works but not for the desired time frame.We have a light attached to one of these. For the past couple of months, it has functioned well.Meilleur point: ne se déprogramme pas si panne d’électricité. Très facile a programmer. Semble robuste (3 semaines d’utilisation à date à-10C et vent)Recommendation: un peu long à s’allumer comparer à d’autres modèles. Si vous devez utiliser plus de un dans un même endroit, utiliser le même modèle sinon les lumières ne seront pas en même temps.Excellent achat et prix.Worked great for the first month, then it started blinking on and off at ten second intervals, now it just stays on all the time. I can't get a refund/exchange on the item because it's been two and a half months since purchase, but I certainly wouldn't buy this brand again, nor would I recommend it.After owning this thing for about 2 weeks it seems to work exactly as advertised. the dusk/dawn auto feature is working like its supposed to, and we've had a couple of heavy rainfalls here since we put it outside on our patio and its holding up just fine, no issues. It does all that for a pretty reasonable price. some other more expensive ones have a remote and whatnot but i dont need that really so this one does it for meDusk/dawn mode doesn't work as it should right out of box. Photo sensor sensitivity is too low or faulty schematics - it stays ON well after sunrise and when another unit I bought years ago from Canadian Tire shuts the lights already. Poor quality. Returning.Using this timer in my outdoor garden, mostly on photocell mode (on at dusk, off at dawn). This has been installed for over a month and has been through major summer rain storms. No issues, all is working as it should.