I worked in Nigeria a couple of times for different oil companies. I used to fly regularly from Lagos to Port Harcourt at least once and maybe twice a week. There are definitely some carriers who fly better equipment than others. There were some real rust buckets flying out of Lagos.
I had several very poor landings at PH and Lagos especially when I flew Virgin Nigeria. Not all the poor landings were due to weather conditions.
We as a company after many complaints switched to Aero Contractors because of our concerns, more expensive but inherantly safer and a lot more professional.