My experience is the same as others. Wear pattern in them is more noticeable, bug killers really mess them up, and as they fade the fade pattern is more noticeable. Our table left a dark square where it shaded the deck and the rest faded differently.
We had to call the company out to re-do the steps because they sagged. The composite stuff needs more support and stringers closer together.
That was on a deck on Hudson that we had for 2 summers. When we moved to the Sault then I built a deck there and did not use composite because of those issues.