saw it. liked it. wish it went for longer. Good to see them all together again, You can tell they loved making the show.
They talk a bit about the plans they had to slowly reveal details that they never got the chance to - they still didn't reveal much of those plans.
There was talk at the end for a 20th anniversary get-together...
maybe they could put together some webseries or something ala bsg / dr horrible...
Sidenote - there are a lot of Firefly references on Castle - most of them go over my head.