I have had a set of rollers for about to weeks. And I love them first couple of days I could barely ride 3 minutes without losing my balance. But I am slowly improving and notice a big difference on my actual rides. Rollers really show you when you doing something wrong with your pedal stroke and are a great training tool. For resistance training just ride outside you are in california so weather is not a big limiter. Plus trainers are just dead boring.