I have a Fluid 2 that I bought a couple of months ago and I have already sent the power unit back for an exchange. When I first started using it, it was quiet (or, at least, as quiet as I expected it to be) but it developed a "tick" on each revolution and was pretty annoying. The replacement power unit has an intermittent noise that, if happens more often, will result in my returning the whole trainer for a refund. I use the skewer that was provided with the trainer because it has the lever on the side, rather than over the center, like my good skewer. However, the drop-outs on my bike are recessed - so the trainer has the potential of damaging the paint. Other than that, I like it just fine.