My old Milano and current 1x1 had/have rear rollers. Rollers/drums are fine for the rear,but I'd never use one for the front. They're not very powerful. Roller brakes are also heavy.

If you live somewhere flat,and don't go very fast,then rollers/drums are fine. There's absolutely no way I'd trust my life to one of these on the front while bombing a hill in traffic here in DC.