I'm fairly new, but have used shredded paper for nesting box filler. The girls seem to like it, but it gets matted down. The problem with using it for bedding in general is that it gets wet & soggy- then it starts to smell & break down.
As brooder bedding I think I'd rather use something else. Didn't care for it much as nest box litter either.
As coop and run bedding I thought it worked pretty well. Works better still if you can mix in just a little of some other type of bedding such as straw or leaves. Through some scratch down on it occasionally to encourage them to keep it fluffed up and you're good to go.
I use leaves, pine needles and grass clippings (deep litter method) in my coops and always mix shredded paper with it. The birds break it down really well and then I put it in the compost bin. I haven't bought fertilizer for my garden in years and have seen no downside by doing this.