Pros
1. Looks 1000 better than the carpet-clad monstrosities
2. Easy to assemble, 5-year-old would understand the picture guide 

Cons
1. Not solid wood, but plywood, and as such, may emit VOCs (see ewg.org). Well, it may or may not. I couldn’t detect any smell from the tree. And formaldehyde has such a smell that nobody could possibly miss it. So the tree stays
2. One of our cats now spends 247 in the upper condo, and we really miss him