I've used these for years but have to replace them about every 5-7 years or so. Should last longer in my opinion.
This latest version is improved in that once you set the timer it activates immediately. In the past you would have to wait until the next watering time to see if everything worked all right unless you used the manual timer.

I started with a mechanical (no battery) years ago and it didn't last a single season before something broke inside. So I bought one of the Raindrips at a big box store that came with a micro-watering system. It worked great. Then I bought another Raindrip timer from Amazon to hookup to a hose bib and water plants with a sprinkler while I was away on trips. It worked perfectly. So I bought another and then another!!!! I now have 4 of these! Battery's last all year and setting the timer is as easy as it gets. Note: I did buy another brand with a digital readout that has places for two hose connections (2 zones) and it's very complicated to program so I don't use it anymore. Another note of caution: Do not leave the timers outside when the winter freezes come. I made the mistake of leaving one outside last year and the water inside it froze and caused a leak in the device. It still works but has a slight drip. I'll probably replace it nest spring. Anyhow....I definitely recommend this timer!

Work good for our spray system in our greenhouse

Love this timer! We have over 30 of these as water stations on our farm. Tried many other brands in the past and these are the winners!! Everyone wants and needs reliable timed water "outdoors" so things dont die. You want this! Its easy to install, screws right right into your existing water spigot. I was even happier when we switched to Energizer "Lithium" AA batteries, oh wow, those batteries (although pricey at $10 ea) avg), it is totally worth it as they will make these units function to their best and longest term and will help the unit avoid premature sticky solenoids. We used alkaline batteries and units failed in a year or 2. We work our timers hard, so on average they last 4 to 6 years. Rainbird brand lasted us less than 8 months These analog units are almost bulletproof as they can handle the harsh conditions of the desert day in and day out, here our direct sun will dry you out so bad, your lips bleed when you smile, what Im getting at is the LCD display timers cannot handle the direct sun either! lol But the LCD Timers are more suitable for an attractive install that's placed indoors. There's a few irrigation tricks you can do to make the best of your property using your timer w/ 1/2" black poly irrigation hose and drip irrigation fittings.

Have used through an entire growing season and then some (about 7 months so far) on original set of alkaline batteries. Easy to operate with reliable knobs instead of clunky, confusing key entry buttons like on so many other designs. That was the main reason for choosing this product. Have used this frequently in manual override function, so that a stock tank can be partially filled and shuts off at desired time. Was so impressed I bought a second unit.