The Garmin Astro is expensive for sure....and worth every penny. I've had one for years and it paid for it self the very first time out.
I had three new pups the year I got it, and had put a lot of work and love into them. It was their first season, but not their first hunt. Surprisingly, my wife insisted we get the Astro.
The short version is:
I let two dogs out in an area where I knew there were multiple coveys. Dog one goes on point 175 yards out. Dog two goes on point at 463 yards (I remember it well). Being pups, I decided to go to the closest dog at 175 yards. I figured dog two couldn't hold whatever it was pointing until I got there. We move a covey at 175 yards and I knock down one.
I look at the Garmin and dog two is still on point. It's been some time so I'm impressed. I decide not to chase singles and go to dog two. I get to within 60 yards and I still cannot see dog two. As I get closer, I come over a small rise that was hiding a pond. Dog (pup) two has fallen though the ice!
I stand there, in 11 degree weather, in the middle of nowhere, by myself, wondering if I should try and save her. She's about 30 feet out on/in the ice. She's hanging on to the thin ice half in and half out and struggling to stay get of the water and to stay conscious. I decide that I'll bust though the ice until the water is at my waste and then I'll get out. Fortunately, the water was only got to waste deep where she was. I pulled her to safety and she's with me today.
Without that Astro, I'd have lost her. She'd have gone under and I'd have never found her. I would have spent a significant amount of time looking for her only to end up heart broken.
By the way, the long version includes my walk back to the truck with no pants on!!
At this point, I won't hunt without the Astro on my dogs. I used to hunt with beepers, but it really ruins the serenity of the hunt.
Buy the Astro, your dog is worth it.
Just my two cents.
Point!