One star off for how tricky assembly was and for how smooth the bars are, making them slippery and hard to grip.  HOWEVER this is a rock solid, very sturdy unit.  A HUGE plus is that because of the flat disc style points where the bars connect, there aren't a lot of places for spiders or stinging insects to hide and make webs/nests; we had a climbing dome in the past with lots of open points that spiders love, and we haven't had that issue with this one.