Boy did I get a deal today. I was passing through EB today whilst Xmas shopping for the Wife, when what did I see on the shelf but FSDS!
Remember that this is the same app on the Abacus site selling for about $65.00 W/O the manual...at EB its $30.00 with a nice glued manual.
My only other 3D experience was with the Halflife editor, and so far FSDS "seems" easier. Although Ive had trouble placing textures properly, which has less powerful controls for texture placement than the HL editor.
So far so good, if you've turned your nose up at other Abacus products like me, you'll be plesantly surprised by FSDS...and now back to my Kate.