Garmin Connect keeps track of the fastest of some distances: 1 mile, 5K, 10K, Half Marathon, Marathon. When a record is set for the shorter 3 distances, it likely occurred somewhere during a run that was longer than the distance(s) for which the record was set. It might be a fun addition to highlight, on the map of the run, where that mile or 5K or 10K was.
Fun but otherwise unimportant feature suggestion.
(I use a Forerunner 220)