I've been lucky enough to get to work with and train on the Pioneer Power Meter. Ever since I came across the data they were providing I had wanted to use the system. If you're curious why, there are several reasons that could be long winded, but one of the largest is that I am a health care provider that works with patients to help maintain balance and symmetry in spite of our lifestyles.
If you're not familiar with the data in particular that I am interested in, it is the force vectors that you're able to monitor real-time as you're pedaling. They've incorporated sensors throughout the 360º pedal stroke, and you can see the angle at which you are delivering power. This is also done independently on left and right cranks.
Why is this important in my experience? I've used several meters over the years, and they've been reliable, accurate, and easily assimilated into training. The power of the Pioneer, is that it provides a set of data that no other unit is providing thus far. This information, provided real-time can help someone re-educate the neuromuscular recruitment to truly help minimize imbalances in their bodies.* ( I have an asterisk besides this comment because there is SO MUCH MORE that I see going on that creates these imbalances and issues in people, which is it's own rabbit hole we could go down. But in general if you can start with watching the movement pattern, you can begin manipulating the issues you have ).
With other meters, one can simply look at your balance and try to manipulate that number by any means necessary to establish a 50:50 ratio. For instance, you may push 150 watts on the left getting 90 of it on the down stroke, and 60 pulling up during a 360º cycle, while the right side also gives 150 watts, but 90 is on the up stroke, and 60 is on the down stroke. This will create quite the imbalance in the foundation to produce this force, yet, what we are measuring the balance by is showing 50:50 so we assume it's ok. ( similar to giving a drug that will manipulate a number on a test that is drawn, but not really understanding why there was an issue in the first place ) .
A bit of a long winded way to say, if you knew what I knew, you'd do what I do. As my ability to generate more and more power for longer and more intense periods of time has increased, what is often overlooked is where the power is generated from and dissipated to. Most will focus on their aerobic capacity or the power from the legs, but fail to think of the core that is stabilizing that ability to generate it. With a balanced and solid foundation, you will be able to sustain a higher power for a longer period of time.