Briefly put: recommended. Easy installation with bgl files activated like scenery addon, corrects time issues at all my airports and thus corrects sunrise and sunset issues I had with Iceland airports. Regular updates are needed to keep track of day shifts and are also provided as download from the developer site. Well worth to add it to your sim world.
This is one of my nicest sceneries for FSX. I full heartedly recommend it. I have purchased it in April 2016 after all glitches were fixed by Taxi2Gate (can be downloaded from their website) and the airport and city are just fantastic! Approaching runway 05 one has a true feeling of being there because of the extensive city simulation beneath and the huge area with custom autogen. Performance wise it is a dream, no VAS or frame rate drops making MMMX a very suited destination of long flights.
I do not recommend this scenery because it is simply unusable in FSX. It has a very high VAS consumption which makes it impossible to fly to. If you do get there after turning all other addons off then the poorly designed afcad comes into sight with AI aircraft staring face to face on taxiways, missing vehicle paths etc. I hope, 6 month after my purchase through aerosoft, that the developer or aerosoft as publisher will step in and correct this addon to render it at least usable for a complete flight. Until then I give them 1 star (and that is because it does look nice) and uninstalled it from my pc.