Still it's a big adjustment. The kids are being great with staying quiet and moving slowly, understanding that we can't just hang out down there all the time. Sis especially is very interested in the new cats. I think it will be quite awhile yet before we even consider introducing them to our other cats, who are quite angry that they can't get into their basement. We're keeping their original owner in the loop because he is so clearly distraught by having to give the cats up (due to family issues and allergies.) I think if he could have found a way (short of a second Manhattan apartment!), he would've kept them.
So, off to a slow but increasingly positive start.
But it's still better than a shelter.