This cogset has wrong ratios for the purpose. An ideal increment for a 3-cog set in combination with BWR is 1.57^(1/3)=1.16, while 14/11=1.27, 17/14=1.21 and 1.57*11/17=1.02, the last wasting a gear. A good set is 12-14-16, that gives increments 14/12=1.17, 16/14=1.14 and 1.57*12/16=1.18, nicely spaced out.
BWR hub optimization is not the main focus of this item. Its more to those who prefer external cogs setup and want to expand stock 2 speed (with minimum cost and effort). 11 and 17t are probably the limits to brompton frame without intrusive mods (frame filing or custom extended free hub body).