Rollers are generally considered to help your riding style as you have to pedal smoothly on rollers, pedal circles as they say. I found that when getting used to them it helps to place them in a doorway, you can keep one hand on the handlebars and one hand on the door jam to steady yourself till you get some "speed" up. It also helps to look ahead rather than down at the bike. The guys at the bike shop who use them lots claim you actually get a better workout on rollers, even though there's no added resistance, because you have to use your core muscles to balance the bike.