Overall, I was disappointed by the product (although I got a good deal so I'm keeping it).
Most importantly, the unit rocks from front to back -- it is very tippy. I'm planning to put it against the house, but it seems like it could easily fall on a small child or animal.
The joints were very visible. The pipes do not come together perfectly, leaving a visible seam, one of which is located at the top of the circles. The tubes are also open, which has made me concerned that insects will build nests within them.
Finally, it was difficult to figure out how to assemble it. (I'm a college student in a math-based field) The instructions were not clear, and the various holes had to be oriented in a specific or else you would have to take everything apart and start over again.