I've done many thousands of road miles on my 2005 Langster, bought new. Aluminum frame, aluminum fork, great geometry. I absolutely love the way it rides, certainly more than any of my bikes with a steel fork (all of which have been collecting dust for years).

My one complaint about the early Langsters is that they use aluminum dropouts without steel plates, which means that that the axle nuts chew them up, especially at the rear wheel. I use washers to mitigate further damage, but I'd much prefer steel plates in the dropouts such as the newer Langsters use.