We love the fleece liners. We don't cover the wood in the cage with it, but we cover the plastic shelves (we have a critter nation) and the wire ramps. We are in the process of litter training him, which means we have a small metal litter box full of wood shavings in one corner and the rest is fleece. He is doing pretty well peeing in the box 90% of the time which is good. We brought the fleece online, serveral people sell them, but they make them cage specific, so you need to know what cage your buying them for first. I would also get several sets, we have three, so we have one in the cage, one in the wash and one spare at all times.
As far as cleaning, I feel it is easier than wood shavings, but I am also doing one cage. When we had our rabbit years ago we had wood shavings as her bedding and it needed to be cleaned less often, but it was more difficult IMO to clean, and the bedding would get everywhere and make a mess. The fleece, every day we sweep the poop from the cage, takes a few mins, and at this point twice a week I am swapping out the fleece, once a week I am cleaning shelves with vinegar and water mixture. I am hoping once he is fully litter box trained I will only be swapping out the fleece once a week. Changing out the fleece alone takes a few mins, then I shake it out and throw it in the wash, and the full clean take longer, but I would be doing that regardless of fleece or shavings.
I also figured fleece would be cheaper in the long run, wood shavings, while not super expensive, is not cheap, and depending on the size of the cage you can go through quite a bit. Even with just a small litter box we clean out every day we go through a big bag every month. We would go through probably three times that if we did his whole cage. The fleece wasn't cheap, but I have heard that it should last about a year.