Just got the ipone 4 and would like user opinions on the WS app. I have 30+ years using autocad, so I am familiar with it, but the mobile appa may be a helpfull tool if it works as advertised....
If you are expecting the mobile app to work like autocad then you will disappointed. It doesn't have quite the precision snap or movement options that the full version does. Also adding lines and other objects can be difficult because the snap doesn't work well. It's good for showing what things look like and adding notes but if you are good with the full version you'll find yourself getting frustrated.