I own two Brompton folding bikes (6 speed and a 2 speed) that I have always enjoyed. I discovered the Downtube Mini B while searching for belt driven folding bikes. I desired the cleaner and lower maintenance of a belt driven, folding bike that had 16" wheels like my Brompton bikes. I found that in the Mini B model.
The Mini B is a nice looking , smooth riding, and quite riding bike that the belt drive lends to. I love most everything about my Mini B, except for two things. Since I have long arms and I adjusted my handlebars to move further away from me in a more aggressive lean, besides the two hand extension grips now being angled forward more, the wheels cannot close close enough together due to the handlebar position keeping the wheels from closing more. This also makes it harder to fit into a bike bag since the wheels are now further apart making the bike wider when folded . I thus have to remove the seat with post in order to zip up the bike bag closed. I do not have any such issue like this with my Brompton bikes which will fold super compact and easily fit in any bike bag no matter how aggressive I may adjust the handlebars on them.
The second issue is the 8 spd , Shimano shifter is rather stiff to shift gears which is what I read on reviews. Not very smooth to shift that round, handlebar lever into gears. I hope it smoothens out and shifts with ease with time and use.
Other than that, I do like my new Mini B very much and since I only want two bikes, I'm selling my 6 speed Brompton , and keeping the 2 spd one along with my new Mini B.
I give the Mini B a thumbs up !