I've had the Sturmey Archer XL-FDD 90mm drum/dynamo for a few years now. Generally I really like them, for a commuting bike. Very little maintenance and good stopping power, I have had the occasional problem with them sticking but I've documented it on my blog. Also I managed to bend my forks not designed for drum brakes when I fitted compressionless cable outers http://smutpedaller.blogspot.co.uk/2014/01/braking-bad.html
I've had the Sturmey Archer XL-FDD 90mm drum/dynamo for a few years now. Generally I really like them, for a commuting bike. Very little maintenance and good stopping power, I have had the occasional problem with them sticking but I've documented it on my blog. Also I managed to bend my forks not designed for drum brakes when I fitted compressionless cable outers
http://smutpedaller.blogspot.co.uk/2014/01/braking-bad.html