I've had a system of six valves set up to water my lawn for about thirty years.  The Original installation was done with Orbit valves and they have worked well ---but eventually as they began to fail I've replaced them now with rainbirds which also work well.  I have not had the rainbirds nearly as long as the Orbits so I can't compare them for longevity.  I think both are good but I now favor the rainbirds which seem to be of a simpler construction---and I'm thinking "simpler is better". ????/