Hi,

I bought my S2L-x this year and use it for my daily 12km bike commute to work.
It is perfect for my daily commute since there are no hills along the way and it is relatively flat.
I am only 5 feet 5 inches and the flat bar is ok.

But for long distances and with hills along the way, you will definitely need a 6 speed.
I recently used my brompton 6 speed with rack to a 2 days trip with food and camping provision and the lower gearing really helped me a lot to get over the hills.

Regards,
ed

PS .... i may replace my flat bar with 2.5 riser bars as described by bikerouc to get a more upright riding position