It is time consuming and it takes a while to get to know it well enough to enjoy it fully, but I love it. Now I have no problems with roads but making edges look realistic and keeping the world flat is pretty hard. Also fittin everything on small map without making it so dense is challenging. But harder thing is to stop placing spawners, It seems I can't get enough of them. I just spent 20 minutes placing that splashing wave in right position! But it does looks wonderful!
I also have less problems with roads if I place large lots where I want them, and lining them with grid on. So I usually place both roads and lots simultaneously, and after all is placed, check and fix each intersection, bridge etc. I also, tend to upload world in the middle, just to get a feeling of it in game. I'm jet to discover how to import families in CAW so that I can export it inhabited..