Component quality seems fine-ish. Lots of people complain about the brake levers. . . they're sort of OK. I think the brakes are still under-powered.
My feeling about the bike is that I can't get over the amount of flex there is, I can't enjoy the bike as much as I think I would if there were some changes made, and it's certainly true that stiffness is a quality that a lot of people appreciate. Tern are trying to differentiate themselves from Dahon and other companies with regard to that aspect of the design. Dahon had already made steps in that direction. Once those (or similiar) design solutions are applied to a bike that folds like a Brompton then you have a superior product, assuming you retain other key characteristics like long-term reliability. Basically, my Dahon plus thudbuster rides better than my Brompton in most ways but that's not due to an inescapable compromise of the Brompton fold. In fact the rear suspension is a big advantage IMO for small wheels. But the Dahon will never be as useful as the fold is crude and other aspects badly thought-out. There's certainly potential for a next generation product but so far not the competitive scenario that'll bring it about.