[QUOTE=Campag4life;16279199]Good insight.
But your first point...how can you give more than what you think is your max effort? Some days you are going to have more to give than other days.

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My point on the perceived effort is hard to explain & is somewhat psychological I guess. Here's an example for when I first started using the PT. I'd do a 20 minute interval as if I didn't have the PT and look at the data when I got home. The data would show what I consider to be significant drops in power for a minute or two during the interval (most of the time on very slight decreases in grade) when I know that I still had the energy to put forth a better effort. The PT keeps me honest during an interval. This probably has something to do with me being so new to cycling.