I got a DT mini, a HH7 and a merc. The last I ride least, because (a) it flexes so much (b) the back brake, even with teflon in/out cables hardly works. Probably because I am tall and fat (210lbs). But is it a merc thing or a general design thing, that I would experience with a brommie? I love the brommie fold, and I suppose I could test ride, but would like to hear if its an issue for any real brommie riders here.