I'm thinking about my winter training plans(here in Michigan). I have a treadmill and we just bought an ellipital trainer. My plans are to ride outside as long as possible. I do cross country ski, but sometimes its into January before we get any substantial snow. So, I've been thinking about rollers. I don't necessary want to improve my form/technique, etc... but aerobic/fitness. I like the idea of rollers because they are easier on bikes. Any advice on rollers over a trainer??? Thank you