We ordered this trampoline specifically because it was supposed to come with the built in water anchor system.  When we received it, ours did not have the water anchors, and the instructions did not reference them at all.  The frame seemed flimsy - the pieces just slide together.  Past trampolines we have had, the pieces click locked into place.  We decided despite the no anchors we would go ahead and build since we waited over a month for it to arrive.  After it was built, we would just use sand bags to anchor the feet.  We soon realized that this wouldn't work because the feet just slide onto the legs and were not secured in any way - if the trampoline were to lift at all, it would lift right off the anchored feet. 

Despite all of this, Wayfair customer service was a dream to deal with.  They gave a few options to help remedy the problem and were super pleasant to deal with.