I've been using my Large Tibuk2 on a daily basis for the past 5 years. I also find it most comfortable to wear it high on the back and that does result in difficulty when trying to bring it around to the front to pull something out of it. So it's a trade-off and it took me a long time to find a happy balance.

Also, I find with wearing it high up on my back I have this huge hanging loop (as seen on the video above) that will grab anything I pass. So I use an ankle relector and tied it up so I don't get it caught on something and take a spill ; )