So we ordered a “small” and I have to say, having owned bigger birds in the past, a macaw or cockatoo would definitely be fine on here. I know it’s natural wood and the description says size may definitely vary, so I’m giving this 5 stars because they *did* include that disclaimer in an effort for full transparency, and it’s incredibly sturdy, doesn’t have a weird smell, and looks beautiful.It took my husband and I about 30 minutes from unpackaging to fully assembled to get it up. Our parrotlet is on here in pics for size (about the size of a finch), and we also have two conures. One of our girls has a slight disability so I wrapped the branches with Vet Wrap so she can more easily get around and so that the parrotlet can move around without slipping/falling since his toes are nowhere near being large enough to fit around the branches.Birds are messy so…no matter how the branches or bowls are positioned, expect to clean up regardless. They toss the seeds around anyway as they dig so the tray won’t catch everything. As far as poop and branch placement, it’s great and the tray catches all the droppings, but I’d recommend a layer of newspaper and then litter of some sort on top so you can just scoop and replace as necessary. They will poop on the tree itself because of the natural layered branches, so you’ll just have to clean the tree every so often.It’s smooth, so there is not much stick for your bird (especially depending on bird size) but I like that my human kiddos are free of getting splinters. The functionality is great—it comes with hooks to add toys and we’re also going to add some ropes so they have more of a playground feel. It’s a fairly heavy tree which again, we enjoy, because you can roll it wherever you want but it’s sturdy enough where it can’t just get knocked over.We have young birds so they were scared at first, having never seen something so big they can climb on. I’d recommend placing the tree next to their cage for a few days so they can get used to it if you have birds that aren’t accustomed to gigantic playgrounds.Overall, definitely worth the money and it’s a nice “change of scenery” if you have one or more birds!