I just replaced an old Nashbar fluid trainer with the Kinetic Road Machine Smart 2. It's exactly what I was looking for. It's smooth, quiet, the resistance is linear and the flywheel adds just the right amount of momentum to simulate road feel.

It was $300 which, at first, I thought was a little high for a simple trainer, but after using it a few times, I feel it was well worth the price and I'm very happy with it.

Now for the negative... The trainer itself is great, but the app (Kurt Kinetic Fit app) is absolutely horrible. I didn't buy it for the app so it's no big deal for me, but for those that expect a reliable, intuitive app (and rightly so), I recommend a little research into the pros and cons of the app. As for me, I find the app so cumbersome and unreliable that I don't even plan on using it.

If anyone finds the app to be easy to use, I'd love to hear from you.