I have absolutely no regrets about the pack installation. I went out this morning to prep the airplane for a trip that we are departing on next week. I never stopped to take my time fitting various bags into the compartment, which I did this morning. Still had room for a duffle or large backpack!
The limitations express the possible loss of performance. My G's manual is in KNOTS vs. the MPH in this example. I would say down at a low altitude (< 3K) on hot days (> 30ºC), I do see about a 3-knot loss. From 7K up, maybe 1 knot at the greatest. I have an air data computer calculating KTAS so the loss would be noticed against the performance charts. However, the altitude possibilities would be hard to measure.
