I installed this shed six years ago.  After exposure to Utah's hot summer sun and some cold snowy winters, it is still mostly in good shape, with the following exceptions.
The skylight panels degraded and split down the middle this past winter.  Lifetime sent me a new pair, and I was able to install them without much difficulty.
The corner trim pieces, which simply snap into place after the shed is assembled, started falling off after a couple of years.  They don't have any structural purpose, so I have just thrown them out.
I would like to be able to hang tools (shovels, rakes, etc.) inside the shed, so I attached tool hangers to the walls, using screw holes that come molded into the plastic walls.  After a year or two, the screws tore out of the holes.  There does not seem to be a secure way to attach things to the walls.
Overall, this is a good shed, and will work for years with little maintenance.