I have to say Curves,

Hydralics are better for body, no soreness EVER and you see results you can work the equipment as hard and as fast as you want.
its 30 min not 30 min plus warm up etc
first 30 min work out in the USA
over 10,000 clubs worldwide.. Contours doesnt have that
BAcked by a university to always improve and do more studies on it.
Always a female there to help you
Contours is a copycat version of Curves and its 29min... (honeslty)