Like Mike, when I started "Now and Then", I thought it would be small city/museum mission.
What appeared to be on first glance a small and basic mission, which surprisingly turns out to be the complete opposite. A fair number of the building are enter-able, but not from obvious locations. The sub-plot and readables related to the inhabitants told well and breath atmosphere into the FM. This mission rewards exploration as it uses space (and time!) very effectively. My small nitpicks are only related to the mapping techniques used. But I believe these along with any other remaining bugs are being fixed by the author and will be due for release in short order.
This is another brilliant city big mission that should be on every ones play list.