Turn on the Sims 3 controls setting in the game options menu. Much easier to get used to imo, esp. if you are familiar with the Sims 3 controls.
Zoom in/out with the mouse scroll wheel.
Adjust tilt with the mouse wheel button (press and hold, then move).
Pan with the right mouse button (press and hold, then move).
Click and hold, then move the mouse side to side to change the facing of objects.
It's not bad at all, I think.
I use keyboard shortcuts extensively, but I can imagine getting by without them. I think i would only really miss being able to quickly change the wall visibility (none, cutaway, full), the current level view (ground floor, second storey, etc.), and the speed settings. But that's only because I actually hate having to click the mouse more than necessary.