I'm in the camp that feels that rollers can help a lot, even if you're an experienced cyclist, but just not any rollers. I've spent an entire winter (indoor training) season doing 1 hr. long sessions on resistance rollers and felt that it made a significant improvement on my pedal stroke/utilization of additional leg muscles etc. as compared to the previous year that I spent the winter (same workouts) on a trainer. With a set of quality resistance rollers, you get the intensity and strength training of 'real world efforts' in combination with the pedal stroke technique. Since that experience, I've felt that although regular rollers can be helpful, when you're really flailing (like trying not to get dropped in a race or group ride) all technique goes out the window if you've never trained that technique AT EFFORT. For me the resistance rollers are the perfect combination of brutally hard efforts while maintaining technique. The one place that they really fall short is on all-out sprint efforts. Although some of my training was out of the saddle, high cadence and effort out of the saddle isn't practical on the rollers. Full gas sprint training isn't much of my overall, so it wasn't much of an issue. By the time in the season that you want to be doing race effort sprinting, it's usually light outside again and you have time to do that on the road instead of indoors anyway.

Also, an argument for rollers...is that whatever eternity that 1 hr. feels like when using a trainer get's cut in half if you're doing the same session on rollers. The added distraction of 'actually riding your bike' makes time go by SO much faster when using rollers. If you let your focus drift you just may find yourself off one side or the other.

-Jeremy