I'm doing a cross country hop eastwards across Canada and then will do the same across the USA westward returning to my original starting point. Along the way I download and install appropriate airports and scenery for the places that I'll visit along the way. Now I got to thinking about purchasing Ultimate Terrain for Canada and the USA. Is there anyone here who has UT installed and can they tell me if they are worthwhile having? Would there be any compatiability problems with it in regards to airports and scenery installed in fs9? Thanks.