I dislike one-lane roundabouts with essentially just a planter in the middle of an intersection. Why bother?
I think there is only one 2-lane roundabout nearby, and I go through it periodically. Usually at a full sprint on the bike, to get clear of it as quick as possible, but traffic seems to move through it smoothly, including myself on a bike.
The biggest problem with our local roundabout is exiting onto a median strip bike lane, especially when towing a trailer, requiring a series of precision right-angle turns, and maneuvering through narrow curb cuts and around railings. I've flipped my trailer there once or twice.