Is garmin edge mtb bundle worth it?

Equipment
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a few folks who know way more than me about MTB GPS have said that a wheel speed sensor is critical if you want accurate distance readings from your rides. The twisting nature of mtb trails (at least in some areas, combined with the way GPS just takes points at a time interval means that they have a tendency to “straighten the curves”. Depending on recording rate, signal strength, and twistiness of the trail, that can easily lead to 10-15% distance under estimation. I’ve seen similar results and a wheel speed sensor pretty much cured it.