You get what you pay for.
The building of this cat tree was pretty hard. On a scale of 1 to 10, 1 being a 5 year old could do it, and 10 being it takes five people to put it together, this was a solid 6. I'm a 21 year old female and struggled with some parts.
The actual parts are not labeled in person, so if I were you I'd do that before you start building as it can get confusing.
The worst part was the hammock since the screw for it kept falling down - the hole is too long at the bottom. Usually have to hold it while you screw in both parts.
The mouse toys seem like they'd fall out easily but my cat doesn't play with them. She's 5 and weighs roughly 2.5kg (roughly 5 ½ lbs?)
This is her first cat tree as I could never afford one before so she's not yet used to the fact that she can scratch that rather than my furniture.