I've had one of these wheels(non hub brake version) for about 10-12 years. Used it a lot to tour around Japan.
Most of the time I have the usual fixed/non fixed flip flop hub. If I know I will have a lot of hills on it goes.
Works great, one day I intend to strip it down and service but I keep kicking that can down the street.
Regarding gearing. I used to have a 39 tooth chain ring with an 18 tooth cog. This gave me a climbing gear of about 58 gear inches and a flat gear of about 80. I still had to get off and push a few times (quite a few times in the Alps) but quite workable.
I have just bought a 21 tooth cog for my next trip as it will be very hilly.
If you have any questions please let me know.