I love this thing.  No comparison to the spring style.  Yes, it is very difficult to put together, but I did it myself and I'm a 68 year old young lady.  The biggest problems are the instructions.  The illustration on how to use the tool is totally confusing and -  don't follow their order for attaching the cords.  Just use your common sense and attach the next  one that is furthest from the mat or you will never get it in.  Even attaching the pad, I did the opposite of the illustration, brought the ties over the frame, behind the leg, then tied.  Pad  lays flat and looks better.  Also, I waxed all the screws and all parts that slid together.  If missing part, call Wayfair --- not the manufacturer.  Also, I used a socket wrench rather than that lame wrench they provided.   Happy bouncing!