Great tool but to me it's the benefits of the software vs. the constant communication to the car. I often leave my car at BWI airport and as such, the battery enters deep sleep so it drains very minimally. Tools that have API access to the car tend to ping for the latest information even when it is sitting. Granted, I'm sure they do a good job the minimize how often they ping the car but really anytime the car needs to wake up to provide this info is just not worth it to me. I get the same benefits from proper trip planning and the cars built in energy usage graphs to not want to risk any additional vampire drain.