It would be great if Garmin Connect could integrate some of the Golden Cheetah app features (I'm currently running both and it's annoying). The two features I miss the most in Garmin connect are:
i. The ability to just select a specific portion of the ride/run/swim (e.g. scrolling on the map or on the elevation chart) and get automatically the average (and why not the max and min) data (power, speed, cadence, HR, etc.) for that portion of the ride/run/swim. At the moment Garmin just provides the average for the entire ride or split which is useless when you're doing interval
ii. The max power curve of Golden Cheetah (x = time / y = power) that is computed based on all the rides is a very helpful training feature providing your peak power for specific training intervals (e.g. you know that your record 20s effort of all time is X watts, 5min is Y watts, etc.
Would be great to be able to select the time period on which this curve is based (for instance, based on all the rides I've done in 2014, my max 5min effort was Y, etc.)