The only thing I don't like about my folding bike (Bike Friday pakiT) is that it keeps costing me money - because I keep buying accessories and upgrades for it, lol. No, seriously, the only thing I don't like is that.....well, it could have a folding stem but that would add to the weight of the bike which is more important to me for my uses, so there's nothing I don't like. My "perfect" folding bike would fold like a brompton, ride like my Bike Friday, weigh less than 18 lbs, and be priced like a Citizen, lol.