I have tried VFF, but got blisters at 10 miles. The zero drop did not bother me.

I ran hundreds of miles on Nike Free 3.0s (4mm drop) and love them - I removed the insoles as they were too small. They are not durable compared to my older Brooks, and I break them at just 300 miles or so, but still - they are so awesome I overlook that.

Now I am running in Nike Free Run Shield - I think they are 5mm drop. I love those also.

Those Nikes - need to buy them 1/2 to 1 full size larger than you normally wear.

I can't stand my older 12-14mm drop shoes now, except for normal wear - which is sad as they are in quite nice condition still.