Gary's Bullitt has a slight problem with the transmission in that it's much noisier than mine. The toughened aluminium, with which the Bullitt frame is constructed, seems much noisier than my steel framed bicycle.
His gearbox has a pronounced clicking noise, which does not occur with my machine. Lately, I discovered that he has had spokes break in his rear wheel. Never happened with me, so far.
The courier bicycle has a smaller chain ring, 40 teeth, cf mine with 60. And still, I wish mine was bigger: too often I am pedalling too quickly in top.