Harold, I have been running the 200I TT for a while now using the Dynamic and "2.5" setting for updates and it is pretty darn accurate... I have the unit paired to an Instinct watch and will usually Calibrate the compass at the start of the day (1 time), mark the truck location when I start to hunt and then lock the screen before I put the GPS in a pocket (with a tether to my coat). I did buy and carry a spare battery pack because they are so small but haven't had to use it yet. I have also set the backlight to time out pretty quickly for battery life. I have several collars paired to my handheld and when I am using only one, I have the others selected as "inactive". I did notice that hilly terrain will hamper to Garmin slightly, but it seems to me that in point mode I will get alerts even as slight as a kennel point almost to the place of being annoying. The old bulky foam cell phone cases with the flip cover also work pretty nice to slip into a pocket, once you trim one side for the antenna.
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