I took this flight ages ago, back in 2003, and in coach, so my impressions are almost irrelevant to your question. It was a 767, and we took off in the afternoon. the flight was packed full, but the crowd was very quiet.
What I remember the most was the descent into LIM, in a thick, even mist: like gliding down almost silently in milk. We arrived around midnight, and deplaning via steps was an added bonus.
There was a huge crowd of people waiting for friends / relatives after passing customs, almost scary how crowded that was.
Sorry I can't be more precise. It was a wonderful flight, and so was the return.
I've flown thousands of miles and I can tell you it's a lot safer than crossing the street!