The Tern Uno, from the photos I've seen, looks like it's yet another Dahon clone/knockoff/rebadge job. The only bike I've ever had stolen was a Dahon, and I was absolutely delighted. It was a horrible thing, with a horrible fold, a horrible ride and a horrible setup. The second worst thing about it was the adjustable handlebars. The worst thing about it was the fact that the folding mechanism always felt as if it was about to come undone- and did, on more than one occasion.
The Brompton is probably the best all-purpose commuting folder out there - the reason they sell so well isn't fashion, it's because they're good at what they do. They're expensive because, unlike most other bike manufacturers, Brompton haven't sacrificed quality for cost and still manufacture in London.
It is a Dahon, essentially...there was some family political reason behind the change of name.
No, and no, essentially. Dahon was, until a few years ago, actually not one company but three. Two- Dahon China, which controlled their factories there and Dahon North America (distribution there) were owned by the founder, David Hon. The other, Dahon Global, controlling worldwide sales & marketing, the majority of R&D and based in Taiwan, was owned by David's estranged wife Florence and their son Josh. Florence and Josh set up Tern in 2011, continued to control Dahon Global, including patents on many of Dahon's then range, and brought most of their design team with them. Not surprisingly years of legal wrangling ensued, eventually resolved in 2013. So if Terns resemble Dahons, it's not surprising, it would be more so if they didn't.
On the issue of Dahon quality, I'm on my third- Chutney was one of the last of the pre-split models- and I can say that the quality had improved significantly between my 2004-model Jetstream XP and the 2010-model Speed Pro TT, let alone earlier models. Frame is considerably stiffer on Chutney, zero creaking, hinge much improved. Josh and team have continued to make big improvements and if I were in the market for a new folder, Tern would definitely be on the shortlist. Dahon, IMHO, has dropped the ball big time on design, and as for their current sales representation in the UK…diabolical. Only a few bike models seem to be easily available in this country, you seem to either have to import or request ones that aren't listed. Parts availability (a long-term bugbear for owners) continues to be dreadful. I ended up importing a chain catcher from Germany a few years back, and I'd still end up doing that now... Tern, on the other hand, have an extensive network of dealers,
Evans plus independents, full range and components widely available online- and fortunately many of them fit current and past Dahon models just fine. I've just bought a Tern rack to fit on Chutney as it was easily the best option.
@srw is dead right about Bromptons being the best commuter folder. Brommies do a a lot of things well, and a lot of things at least reasonably OK. There is no such thing as 'no compromise design', certainly not with folders, and Brompton have chosen to make a folding bike, rather than a bike that folds. That, and their determination to maintain backwards compatibility as they introduce improvements, does mean that in certain respects it falls behind the best of the competition, and they simply don't offer some of the choices and features that rivals do. Lightest? Nope. You can buy a 9kg Brompton, if you strip it down and fit the simplest gearing. Want a 9.something kg folder
with gears and you'll be shopping elsewhere. You can't have a wider gear range than the six speed without going to third parties. Fastest fold? Nope. Smoothest ride? Nope. Simplest fold? Not necessarily (I've seen a few Brommie owners having problems), though that's more a case of learning how to fold it, rather than anything specific to the make. But definitely the smallest fold, and the most convenient (if not lightest) to carry folded. Though I'm not entirely sure why a young lady I saw at Victoria the other week was pushing hers into the station on the easy wheels rather than the rather easier 16" ones....
I wouldn't buy a Brompton- for my particular folding bike needs, Chutney ticks all the boxes. It folds small enough, it's nippy, comfortable, has proved more than up to the job of riding centuries (and barely slower if at all than the other three in the fleet). It's just a great bike. Using it for the Normandy/Belgium holiday this year will not in any way be a chore. But, it's never going to fold as small as a Brommie (20" wheels give in ride quality what they take away in size), will never fold as neatly or as stably (magnets don't hold that well and it sits better with wheels slightly apart anyway). You pays your money....