Must have scenery. Fantastic textures, key landmarks and surroundings, awesome optimisation, VERY fps-friendly and AES supported. MDesign UUDD FS2004 reaches the highest level of scenery development for FS9. There are only two cons: no amimated ground traffic and poor documentation. I haven't seen such a cozy scenery since UNNT Novosibirsk Tolmachevo was released by TolmachevoTeam.
Think twice before you buy this scenery. Or at least download a demo, it will help you to make right decision. Performance is very poor. I've got 60 fps (locked at 60) only with no options installed, no AI and no weather. I have also noticed blurred hangar textures and flickering textures of another hangar. Some other users and I confirm flickering ground textures appears after landing. If you disable extra details option during installations you will get 'flying' SafeDocks at some stands. Afcad is terrible and there is no chance to edit it due to EULA limitations (see official forum for more details). There are some more bugs such as wrong apron colors, wrong taxiway marking, wrong stand marking with lack of octagons, strange geometry of some stand markings. Night textures are not reproduce the real airport at night. Be careful with v1.1 because it can cause OOM errors. See forum for the fix. UUEE 2015 was the most awaited scenery of the year. And UUEE 2015 is the biggest disappointment of the year. I want to make a refund. There were no notices about non-editable afcad file.