The Themepark Studio concept is a little exciting, but it seems there are aspects where they sacrifice realism in favor of making it play more like a game. I do not believe I have heard of NoLimits before, but on first sight it looks like it would be more for me. On their site there are 2 paid options for NL2, Standard and Pro. But the Pro version seems to basically just give you more options for making screen shots. If anyone has more information, because this program seems to be worth looking into.