As I tested the game, I should say that the demo is pretty short, in a linear part of the storyline. ACT1 is much more varied than in the demo Combat is much better than in <img src="/ubbthreads/images/graemlins/div.gif" alt="" />, especially the magic system rox in later stages of the game =)
As for food for rest, works pretty good, much more believable than 'insta health' food. Might and Magic series needed food for rest and travel too, although you had to buy it.