Works great! I have the 4 output timer and it's essential to watering a large number of plants I have. The design is simple and it just works. The battery tray has a seal too which protects the inside from being destroyed by water. This is a big problem with many other brands. My only wish is that Orbit would embrace Right to Repair so that we could fix these at home when they break. I want to keep this device forever but nothing lasts forever. With simple disassembly instructions and replacement parts I could keep it going forever which would go a huge distance to keeping plastics out of the ocean, out of landfills, and from generating toxic e-waste.