I have a folding Brompton M6L. Red and Black. I got them in October 2008.
I decided on a folder for two main reasons: I have no space in my humble abode so the folding option serves me right as I put them under the dinner table. My old Apollo are slowly rusting outside so outdoor storage was never a great option. The second reason is the fact that I live in Bondi Junction and work in Willoughby. The option of folding the bike and hopping on a train at Central, getting off in Artarmon and unfold and cycle to Willoughby is just great. Some days I do the whole schlep from Bondi to Willoughby.