I have a Windsor Oxford from Bikes Direct with a Nexus 3, the no brake version. The hub works great, but I sometimes wish the bike had a coaster brake as I do ride in the rain from time to time when commuting to work. I have found Nexus 3 coaster brake hubs for cheap, as well as built-up wheels with Nexus 3 coaster brake hubs, and have considered swapping out my no brake hub for a coaster brake hub.

Are there any downsides to the coaster brake Nexus 3, when compared to the no brake Nexus 3 I have now?