Looks sturdy but it’s flimsy in wired places. See the photo. The back hinges for the cover attach to threaded inserts that are in a very thin wall of soft plastic. Why?  Fortunately the piston assists for lifting the cover attach to metal. Came as a 105 lb 6 ft long box. FedEx beat it up so we were missing some metric screws.  The shrink wrapped card got squashed in transit, releasing half a dozen screws. These were too short anyhow given the problem in the photo. Plan on replacing some M5x12 with M5x16 or 20. The hardware card could easily be packed in a more protected location. Finally the instructions say it just clicks together. That wasn’t our experience. Try flipping it over and gently beating the mating features of the first L wall you assemble with the flat end of a big log. That worked. Flip it right side up, position the second L. Flip again. Beat with log. Flip again. Perfect!