Trail tec Gps

I am looking into the Trail Tec Gps system that I believe Polaris uses as well. Want to use "the Buddy system" since we are in tight trees all the time. How do you guys like it. Also is there better set ups out there and have you already done price comparisons on the different units. Thanks.

Thought there would be some chatter about these. Maybe not as common as I thought they are.