Zooplus do make some good trees and I'd say the quality was so so. You do get what you pay for when it comes to cat trees. I've a smaller one (about 3 feet high) that I bought for about £60 over 9 years ago and the rope around the posts is in better condition than that on the zooplus tree after less than a year. The fake fur on the zooplus tree is also torn in many places.
I bought a ceiling high one from zooplus but have never got it to work properly (it relies on pressure to hold it in place but I could never get it to fit against the ceiling in a way that it wouldn't move) and as a result the tree snapped in 2! The reason it snapped was down to a design flaw imo as the hammock hung out over the side and the weight of a cat in it caused the posts to buckle as they are hollow with just a small disk to screw them onto the platforms. They did send me replacement posts but at the moment it is still in 2 pieces (which we are happy with at the moment as they use both sections the way they are now). I wouldn't necessarily say don't buy a zooplus tree as I think so long as you don't get one like I got they are ok, but for their size they are quite cheap and they won't last as long as a better quality post. This is the one I have