Just did an embarrassingly titled workout video.  I built up a sweat, had to drop layers, and really felt the resistance.  It was only about 25 minutes once I got past the instructional part and skipped the end (ads for the hotel where it was shot).  I'm really going to make an effort to get more resistance/weight work into my regimen... I just want to look as hot as I used to... not this marshmallow nonsense I've got going on right now.