we are seeing more and more of these in Minneapolis and so far so good.people are getting used to them and some even are brave enough to go into the outside lane with someone on the inside and not use it like another form of stop sign.
the only problem i have had is that people don't obey the 15MPH sign as you come up to it.that throws off the people trying to drive into the round about who think they have time to enter only to have speeder blasting thru.