It varies quite a bit. If we have line of sight the Kenwoods are great. The more hills and trees there are the more unpredictable the range becomes. Most of the time I'd estimate worst case scenario we have at least 1/2 mile range but can have up to about 2 miles on many roads. When testing by leaving one person in a fixed location and the other in a car we often saw 1 mile range being good even with a fajr amount of trees and rolling hills but sometimes we found up to 3 mile range. Granted, because we are following the path of a paved road it may not be 1, 2 or 3 miles in a straight line.
Most of the time line of sight limitation would be fine for me. The biggest reason I could not go with Bluetooth is because I wanted bike to bike, two GPS units on longer tours, radar detector and 2 way radio and I did not want to bother with charging batteries of these audio sources or the headsets. If it were just bike to bike or bike to bike plus GPS and/or phone a Bluetooth headset probably would have worked fine. Plugging into one cord on the bike beats charging bluetooth hubs or devices every night or making sure they are charged before a short ride.
