Was challenging to line up segments correctly during assembly. Another reviewer mentioned that connecting receptacles for bolts seemed "stripped " and it's an easy mistake to make when trying to screw them in incorrectly. In reality all they need is very careful positioning alignment when screwing them in.
It's tough to give it more stars so early in its life. It is comfortable and flexible enough and was fairly priced. I would bump it up to 5 stars if it lasts more than a year with no (natural) tears or cracks.