I purchased this set for my Grandson one month ago for Christmas. My friends helped put the set together in a weekend. Although it may give the appearance at first to be " unsafe" and possibly "flimsy", but once the set was assembled correctly as stated in the manual as well as the additional leveling and positioning and materials installed on the ground beneath the set. It proves to be the sturdy, safe high quality  play set that( once sealed ) will provide the fun and exercise for many children in my family. As for the weight factor stated in one review I weigh close to 115lb and when I went up to test the safety of it I didn't hear a creek or a squeak nor did I  feel even a wiggle from underneath my feet. I even took a ride down the slide with no negative reaction fro the set. 
Not always can the durability of something be stated by its appearance but possibly by the care to assemble it as the directions state.