I did this several years ago.
I wouldn't do it again.
I found the front shoes wore quickly - they didn't last as long as a good set of pads.
I had to strip the whole thing down after one winter because the cam siezed and the brakes wouldn't release.
After a certain wear point, the front brake would "servo" on and I would have to rock the bike backwards to free the shoes. Worse still, it would snatch and lock the front wheel solid just before coming to a gentle stop and I'd have to do an emergency unclip - I normally try to ride smoothly, am light on the brakes and try to avoid dabbing my feet down (I love track stands
) so having the brakes lock on was a big headache for me.
The brakes didn't improve much with age. They were adequate but still outperformed by a good set of pads.
The rear brake was always gentle, it would lock the rear wheel if lightly loaded but with heavy panniers it was incapable of locking the wheel.
I tried different advantage levers to see if it would improve but no real joy.
I did like the five speed hub and the dynamo but they were both let down by the brakes.