I'm biased .. I've done a few 2 speed automatic conversions dating back to 2009 .. if set up correctly, they are a real treat to ride.. Links below are of my favorite conversions that I rode/ride regularly .. the Titanium road bike is the only one left in the stable .. the others went to happy homes .. they all had coaster brakes which I happen to like .. I never had a problem with the hubs through the years.. pretty much bulletproof in my applications.. the SRAM Automatix shares many of its internal parts with the Sachs Automatic from the 70's which was always a very reliable hub, even used in European tandems ..

http://www.bikeforums.net/13117387-post1.html

http://www.bikeforums.net/9824032-post1.html

http://www.bikeforums.net/15619970-post47.html