I take it the Wahoo has at least one or more advantages over comparable systems provided the user doesn't already have a bike with on-board power. Wahoo gets your nod on the basis of one or more of the following: road feel, power metrics, open-source applications/additional room for growth. How would you rate its noise output compared to the TruTrainer?
I've already got the crank-based power meter, so I'm leaning TruTrainer at this point. I'm sure the Wahoo is more entertaining, but I'm not one of those heroes who's going to do five hours on a trainer. Three hours is my limit on a bike that doesn't move, and shorter interval-based training sessions are intense enough to do without diversions.
While I like the idea of the computer varying the cadence/effort to keep you fixed on a target power, I do think there is something to be said for using your gears to vary the effort and keep the cadence in the zone that reflects your actual power point on the road. If I make peak sustained power at 95 RPM, and the computer's plan doesn't include high cadence, do I wind up fighting the comp and have to deactivate the feature?
My long-time a-frame trainer seems to be at the end of its rope, so I'm approaching a replacement decision. Even though I have power on board, I'm going to try to sample the Wahoo since it impressed so deeply.
If you have a Power meter that can link up to some of the training apps available, that's a real plus. The Teutrainers make some noise but they're pretty quiet. It's been a little while but I remember them not being loud enough to bother me watching TV etc... Again, the fans I use were louder than the rollers.
I really like having the variability that comes with the wahoo versus using the Quark or Tap I have and running rollers. I think the different courses set up (and automatic regulation) and all of the data feeds are better across the board.
But I also have a screwed up view of reality because a lot of this gear shows up and I get to pick and choose. If I had any sort of budget, I could be VERY happy with a good set of rollers and a Power meter. In fact I would have killed for a nice set up like that several years ago...