I have not used it in the field but my Garmin fits great.
The large pouch is a perfect fit for a Garmin Rino. Keeps the radio safe and yet easy access. It’s not in the way so I can draw my bow or raise a rifle. Small investment to protect a large one. This is a must get addition to any system if you have a rino.
It fits my Garmin Rino 755t perfectly and holds it really well. Bungies have stellar retention and it's not too difficult to put in or take out with the bungie tether attached. Very like.
I recently purchased an Ultralight upland system and needed a pouch for my Garmin 320. The pouch fits the Garmin perfectly and keeps it out of the way but easily accessible. I originally intended to use the system without the yoke but found out that I had to tighten the belt so tight that it was uncomfortable to keep it from slipping down (I have the standard old man build, gut with no ***). Using the yoke the system works great for me. I removed both water bottle holders and added the radio pouch and a large zippered pouch and just carry one bottle of water in the bird bag bag. very comfortable and much cooler than the upland vest I have used for years. Great quality build.
I have a Midland GTX and it fits perfectly! It's tight, but that's exactly what I wanted.