Now with the PM I can accurately guage effort whilst training and racing. By the way the last three years since having the PM has been when I have only been racing on the road and velodrome and not triathlons due to running injuries. So I am a roadiegeek thank you very much.
My preferred event is the TT and have seen the benefits of embacing sports science from using the PM to also the free speed by improving aerodynamics from a session in a wind tunnel back in 2008. You may ignore the science, but I gained an estimated 43 Watts saving at 40 km/hr!
You may start to realize more and more cyclists (road, tri, track, MTB and even BMX) are opening their eyes to the benefits of the PM. There are many available journal articles and studies which support Wattage as the current best method to measure effort on the bike. Feel free to ignore the decades of sport science that has gone into the ability to know the various levels according to Functional Threshold Power (FTP).
It's your choice to rely on old training philosophies and training methods, mine is to embrace what is the latest training knowledge and methods to improve.