I currently have two IGH hubs, a Sturmey Archer S-RF3 and a SRAM Automatix A2. With proper chainring/cog selection, I have both hubs set to mimic the gears I usually ride in on my road bike. These are both very simple hubs, and are very efficient. I especially like the Automatix 2 speed. I've stripped it apart and put it back together. There is very little to go wrong in the hub, and appears to be built to last a very long time. I've lubed it with some simi-liquid "00" grease, which is light enough to work in cold weather without adding drag to the hub.