I was skeptical about the buy once cry once theory but I bought a Kifaru frame and reckoning bag off here through a buddy and am not sorry! It really shines when you get the weight in it!
I have an EXO and love it. They are simple with just enough pockets. It’s simple to remove the bag and pack meat between the frame and bag or without the bag.
I have a MR Marshall on a guide lite frame. Best backpack I have ever owned. It compresses down very small if needed, or it can carry enough for a 5+ day hunt.