Noelwrote a review of Wahoo Fitness KICKR SNAP PowerTrainer on December 3, 2016
Familiarity: I've put it through the wringer
Last year, I spent the winter riding on a Cycleops Jet Fluid Pro trainer, which is a "dumb" trainer. I used a PowerTap hub in my rear wheel to measure power so that I could use Zwift. Everything worked great, and I was amazed how quiet the trainer was compared to magnetic units I've used in the past.
This year my wife wanted a dedicated trainer, so she took the Cycleops and I got to upgrade to this, the Wahoo Kickr Snap. Oh man, it's amazing!!! I honestly didn't think it was possible, but it is even quieter than the Cycleops. It is the quietest trainer I've ever used, bar none. As you might be able to tell, this is really important to me, because I live in an old wooden apartment building with neighbors downstairs who I like, and don't want to hate me.
As for the "smart" trainer aspects, the Kickr Snap is always within ~2-5% of the power reading from my PowerTap hub, so I trust it. The variable resistance when using Zwift (how I do most of my indoor training) is amazing, and feels pretty realistic. Overall I couldn't be happier with this trainer.
If you forced me to find one flaw with the trainer, I can think of only two. First, it's annoying to have to stop and calibrate the unit by "spinning down" 10 minutes into every ride, but this is a small price to pay for a power-meter smart trainer at this price. Also, even though the stance of the trainer seems just as wide as the Cycleops, the Kickr Snap is more likely to rock side to side when I'm doing an all out effort (~800 watts...hey, I'm little). This is no big deal for me, but if you can push 1,000+ watts in a sprint, you may find yourself rocking this trainer more than some with wider stances.
In short, I couldn't recommend a trainer more highly.