I have roller from around 1972, they were my dad's and I have been riding them for about 15 years. I have heard that some of the cheap roller drums can go out of round, but a quality set can last for a long time. I also use a trainer with a power meter for intervals, but for cruising the rollers are much more natural feeling. My rollers feel like riding on the road with a tailwind, not enough resistance for the short intervals, but good for 10 min + intervals. Rollers are also much louder than my Elite trainer, and I have heard that the wind resistance units for rollers sound like an airplane engine.