I simply don't see the r-vans around here. Not saying they are a bad nozzle, I just don't seem them. They put out more water than the MP's so there is no real advantage, whereas you can put more heads on an MP zone. Yes, you will have to run that zone longer, but it helps with certain areas, maybe you can have a complete full sun front yard on one zone as opposed to two. Fewer valves. I have most definitely seen them stop rotating though, I would say that's my biggest complaint.