I found this practical to be more interesting (and easier) than the Unicycle, probably in part to do with increased confidence with Maya and in part to do with the less rigid nature of the activity (i.e. modelling a form from nature rather than a mechanical object).
It would be nice if the Mirror functionality actually worked as you expect, instead of combining your new poly with your old one despite being told to do otherwise, but meh.
I especially enjoyed the 'fine-tuning' aspect; it reminded me of my UT2004 mapping days, tweaking BSP structures and manipulating static meshes to get some cool level geometry happening. If only I learned modelling back then!