I saw it @ the Grauman's Chinese Theater opening night and it was one of the best moviegoing experiences ever, house packed to the brim, everybody was completely into it, and then last January I saw it again at a real grindhouse style theater in beverly hills (a contradiction, I know.. there was even water leaking from the ceiling due to the rain). The crazy thing is that at this 2nd showing, the film ACTUALLY FUCKING BURNED UP during Planet Terror and most of us thought it was the part of the movie where it did that, but we could hear the projector making a loud grinding noise though. We kicked it in the lobby for 20 minutes until they fixed it. It was definitely a true grindhouse experience.
Favorite part of Grindhouse: "Give him the guns... Give him ALLLL THE GUNS"