Overall I think it's a great product. It's a modern cat tree the aesthetically fits in to modern, industrial, or brutalist decor with ease. The wide base makes it very stable for large and playful cats. The scratcher portion is not load barring or structural necessary so removing/replacing should be easy and provide longevity to the life of the product.
My biggest complaints of the product primarily has to do with packaging, instructions, and some of the parts.
Packaging was overall good, but I think more could have been done. I did have a couple pieces of bent/nicked metal, but nothing that gave an difficult to building or required replacement. Similar with some of the wood pieces. Again, wasn't anything severe as it was all negligible, but for the cost of the product I would have expected more thought put into making sure that there was sufficient foam/packaging to not even have those things happened.
Instructions where overall OK, but again I kind of just look at the price and wonder why more effort wasn't put into them. It was a single sheet of paper, with small print that anyone with bad eye sight would have trouble with. Pieces had letters/numbers assigned to them, but there wasn't any stickers on them so you just had to reference by picture. The structure isn't perfectly symmetrical either, so there's some pieces that are 2-3 inches longer than others (like the I-Beams) and others where the orientation is critical because one side is 2-3 inches longer than the other (like the T-Beams). Both mean that if you aren't paying attention and check future steps that you could easily put things together incorrectly and then have to take stuff apart to fix it. I can't imagine it would cost that much extra for them to write up larger and clearer instructions that go on 2-3 pages rather than just one.
All of the parts for the product where fine with 1 exception. The product came with rubber caps that are supposed to cover the holes in the beams where the allen bolts go. These rubber caps are about 1/4 inch too small, so if you push too hard you push them into the hole and potentially lose it inside the beam. Just another thing where I went "Really? For what I paid, this minor thing wasn't QA checked prior to mass manufacturing?"
So like I said...overall 4 stars and it's a great product. I'm happy with my purchase, but I'm frustrated with these little problems. At $600 one of the things I'm expecting from my purchase is to not get frustrated. I'm paying a premium not just for the product, but also for the stress reduction that should come with it.