I test rode a number of folding bikes in 2008. Dahon, Airnimal, Birdy, Pashley TSR and Brompton at various bike dealers. I distinctly remember a conversation with a Staff member of Bicycle Doctorhttp://www.bicycledoctor.co.uk/ The guy pointed to a Titanium S-Type 2-speed Brompton in the corner of the shop and said "if you want the best folding bike then I would recommend one of these, this is the shop bike and we all run errands on it, fantastic little bike" I took that bike out for a test ride and really liked the riding position and the way it handled.
As I have said elsewhere, I got side-tracked by a Dahon MU SL (big mistake) .... but early in 2009 I put in an order for a b-spoke Brompton titanium, 2 speed, S-type in raw lacquer. I love this bike, best thing I have ever bought (apart from this MacBookPro Laptop). I use it in conjunction with the train and it fits perfectly between the seats on Merseyrail trains.
I can fold this bike quickly (around 10 sec) and it often draws conversation from people on the station platform.
I have not had ANY problems with this bike, it still looks great and there are no nasty squeaks, rattles, slipping seat posts or clamps / hinges that wear or develop play (as I had on the Dahon).
The other nice thing about Bromptons is that they are made in the UK and all the spares are available form the likes of
http://www.sjscycles.co.uk
I'm sure you will love your new Brompton as so many other owners do.