I've been commuting with my M6R for two years. I love my Brompton and its small folded size is great, but beware if you intend to ride on "challenging hills" - the gearing limitation of the Brompton sucks. Tikits come in a far greater variety of gear configurations and it is very costly to make gearing mods to a Brompton. Having said that, to me the Brompton has enough advantages - better, easier wheelability when folded in my opinion (some Tikit owners disagree - I found it very awkward - *maybe* it wouldn't be quite so bad with practice), and compact fold, being two - that if I had to do it all over again I'd consider getting the cheapest model Brompton (single speed? 2-speed?) and spend the extra money to do one of the mods that would give a decent amount and range of gears, enough to tackle "challenging hills" or do loaded tours. On the other hand, I wouldn't mind owning a Tikit *and* a Brompton! Just my opinion...