My DH and I both have CycleOps trainers. His is fluid, mine is magnetic. His is WAY louder than mine and the resistance is crazy high...like I lose at least 3mph given gearing and effort comparable to if I were riding on flats outdoors. I kinda wonder about CycleOps' quality control. I had to send back the resistance unit on my trainer when it was new (our LBS couldn't simply exchange it, since my trainer had been bought at the end of the season and they no longer had any in stock to exchange). The roller was warped and when I'd ride the vibration pulsating through the house sounded like a freight train. I've ridden other units of the same model my DH has and they don't have the same insane level of resistance.

Their CS is awesome, though. They sent me a new resistance unit with only a scan of my original receipt and serial #. They also sent a box to return the defective resistance unit in.