I am pro-roundabout but hear me out on this. I was in the Twin Cities this weekend where there are many roundabouts. The issue I have with them is you have to Yield to enter them. When the roundabout is busy with cars coming from the left on the outside lane the Yield becomes a Stop and cars start to back up to enter the roundabout. How is that better than a 4-way stop? I would say it is marginally better, so there is that. Also, when there is little traffic in the roundabout it is nice to not have to stop at every intersection, instead just cruising the roundabout.