This episode was neat. It had an intersting start with what looked like the real atlantis turning out to be a clone made by the replicators to aid them in their goal to ascend. Also the visions from the Seer are explained in this episode. The vis effects are top notch and were very effective in what they needed to show.
Off the ball a bit, i respect other's people's opinion i really do, its healthy. But why do people need to over analyse everything and whinge that this story has been done before, when its only a small portion of it anyway. Just enjoy it for what it is, its a show its meant to entetain people. Why wreck a good episode by worrying over things that well, no one really cares about that much. I bet you when atlantis wraps up in years to come everyone will say how they miss it, when it will be the same people who constantly nagged about the negatives of it.