I thought this would be a great sprinkler based on the reviews and the Rain Bird reputation, but mine is a dud.  It gets stuck in one spot causing a flood and will not rotate the opposite way.  I read on another review that the position of the stops matters and I've tried switching them so that the top stop is on one side and the bottom the other, and vice-versa, but that did not resolve the problem. I might try some light grease on the stem but if that doesn't resolve then I'm out $15.  I'm using this sprinkler on the Orbit sprinkler base (#58030) and there is plenty of water pressure.  Similar Orbit impact heads I bought do not have the problem I'm having with the Rain Bird. I'm disappointed as I was hoping this would be a great product.