For me personally...and this is just my observations, YMMV.

1: They are too heavy.
2: They lack a significant amount of grip.
3: The sidewall is flimsy compared to the robust tread area.

For all of those reasons, that is why i run the Schwalbe.
But the Gatorskin is $30, and the Durano Plus is a $60. So i have a feeling that is why alot of people, especially in this forum, are initially drawn to the Gatorskin. That and because it is a metal bead tire, and everyone thinks you have to run a metal bead here, instead of a folding tire. Which is nonsense.

In the end, the Gatorskin is a perfectly fine tire...for what it is, at the price it is available. But once you move up to a premium brand tire, its really hard to go back to such a poor performing, hard rubber, heavy tire such as it is.