Revealing mistake: After Carrie leaves the hotel bathroom, Samantha is getting out of the tub. In the mirror behind her, you can see that Kim Cattrall (Samantha) is wearing some sort of dark pink undergarment below her waist to hide herself. (00:19:35)
Revealing mistake: While Carrie and Sam are in the bar car, the train bumps and the passengers swerve to the left.Problem is, they do not move in sync, revealing the camera trick. The first one to move is the girl in front, and a second later the woman on the left moves.
Answer: Yes, it is.