I recently built up a bike with mustache bars. I love climbing, so the wider gap between my hands is great. I've done some pretty long rides on it, but I don't think I'd tour with it. When you're on the bike for than many hours for that many days you absolutely must have a comfortable upright position, which mustache bars just don't offer. I love em on my road bike, and will gladly do some very long rides with them, but for multiple days in a row I just could not recommend them.