I'm not really a big fan of grid based city-building (I tend to experiment with diagonals and orthogonals), but unsing only maxis stuff, you don't really have a choice (I personally think maxis should've included diagonals). I have to say though, it looks great considering you only used maxis stuff (altough you might've wanted to turn off the UDI icons

) But believe me when I tell you that the stuff on the LEX/STEX is like a stairway to heaven for making realistic cities (have a look at some of the MD's).
Anyway, goodnight
Xander