I've got a bush-n-a-bag and a leafy suit (not a ghillie). I got the leafy suit some 20 years ago and have killed a lot of critters with it over the years. Most of the time I just wear the top.
The bush-n-a-bag is very good camo, but I have a hard time shooting with it on. It's not the arm so much as the chest. I use a 69" bow and the chest catches on my bow string. I'd really like to use it, I just need to figure out how to keep the chest in tight to my body.
My leafy suit does work just about as well, though, and it's much easier to shoot out of. There's no need to take it on and off. It's mesh underneath, so in the heat, I can wear a dark tee shirt under it.