Only reason it didn't get 5 stars was that one of the steel poles had a raised welded seam on inside of tube preventing it being pushed onto mating piece. Was ok after 10 minutes with a half round Swiss file. Once assembled and base filled with water it's very sturdy and perfect for kids & adults. This is the first time we have bought this ball which is a cheaper alternative than other replacement swingball and tethers. It is for our youth project and we go through lots and lots of replacement balls as it is a much loved game by our teenagers. At time it is really frustrating that it is at times cheaper to buy a new swingball set than replacement balls which is often the case. So this cheaper version seems to be holding up.