I have bourbon reds so everything following applies to them, YMMV.
Pros:
- Personality
- May deter hawks and snakes
Cons:
- Personality - way too curious and get into things sometimes
- Loud
- Hens pick on my roo
How much feed:
A turkey hen will eat about 1/2 lb of food a day when growing, a little less than that once grown
A tom will eat about 1lb of food a day when growing, 1/2 - 3/4 a day once mature.
Eggs:
My Hens are in their first season of laying and I am getting an egg every other day.
Mine free range sometimes when I could observe them, I have no fence yet so I cannot comment on full time ranging. Mine were really good until they started breeding. I let them out and instead of herding together they scattered - it was a royal pain to get them penned back up that day and I have not let them out since.