Are hub gears & roller brakes as awesome as I imagine?

I am a big fan of hub gears. The Sturmey Archer 3 speed is completely indestructable and virtually maintenance-free. It's engineered like a locomotive. I've pulled apart and serviced 40 year old ones and they are like brand-new inside.

I've currently got a Sturmey 4 speed with dynamo on my Raleigh Superbe (it did have a 3 speed) which is perfect for the bike, and I have a 7 speed Shimano with coaster brake waiting for me to find a rim and get the wheel built. Then it goes on the famous Blue Quinn.

I've got the FG 4 speed dynohub on my Raleigh Superbe too. I have the problem that it drops out of gear into 'neutral' from time to time. Granted it's 45 years old and probably needs a service. Not massively keen, even with Sheldon's instructions to get it in pieces. By all accounts there are very few problems with the later ones though.