Personally I tend to prefer Pullin' Shapes -- "RoadKill"
http://www.pullin-shapes.co.uk/page8.htm
Not the most friendly interface once you leave Maya/Max/(XSI too I believe) but it's free, quick, easy, and supports advanced stuff like Pinning too. (And getting better with subsequent patches apparently)
Just thought I'd point out some free alternatives -- you know -- since they tend to end up just as good in most cases.