You mean the Lynden-Bellingham highway? I think I generally like them but the entrance into the roundabouts are weird... really tight.
Edmonton has numerous two lane roundabouts around the city, they generally work, but my first time in one I had no idea what I was doing. lol, but I quickly read up on them after the first time and learned you're supposed to yield to all traffic into the circle, enter the circle at the same time as the car next to you, and then if you're in the right you can go straight or turn right, if you go left you can go straight or turn left, there is one roundabout around Bonnie Doon which has 5 points of exit though my dad used to drive through a lot but I haven't really, Edmontonians are pretty seasoned with these things though.