I replaced our flaky sprinkler system controller this weekend. All by myself.

The unit I chose was the Rachio 3 Smart Sprinkler Controller. They offer 4, 8, and 16-zone versions. My system has 9 zones because of course it does. The good news was that Costco sells a version with 12 zones for the same price as the standard 8-zone model. Yay me!