I used a Rohloff for a few years. In my opinion, it is too complex (internally), too expensive, and over rated. If anything goes wrong, it is virtually non-repairable. Recommended oil changes kits add to the cost. Using a Rohloff on an existing bike requires some undesirable compromises. Initially, the rear cable mount was on my rear brake calipers. This proved to be unreliable because water got into it, causing the rear brakes to work poorly. Also, there was too long a lever-arm that caused the mounting to get weak. Not to mention, a Rohloff on an existing bike requires a custom wheel build.
I did the continental divide trail with my rohloff speedhub. While others were cleaning their chains and adjusting their derailleurs I could relax. It did the entire trip without any problems at all. I read about people who circled the world (30000 mi) and turned the hub in for a service check up at the factory in Kassel, Germany: The hub came back with the note that no service was necessary. I have never ever heard about damaged Rohloff hub. All parts a manufactured in Germany to the highest standards and not somewhere in Taiwan or China. I admit that the hub is complex and you will never be able to fix anything if it breaks .... but it will never happen - unless you abuse it. I would have no worries whatsoever biking 10000 mi across USA with that hub. What I dont like about the hub is, that it has a slightly higher resistance - it annoys me when road biking but not a problem if going off road where the avg speed is lower.