I love these sprinklers. The only thing I don't like is that the small button on the underside is meant to shut off the water when it reaches the ramp. It is plastic and sometimes breaks. You have to replace the whole motor instead of being able to replace just that part. The motor is costly and it requires a bit more mechanical skill than I have to replace.  It is not hard to replace if you have the right tools but I don't have the right tools....