In my personal experience you can eat more when on Carbolin 19 and not gain BF. I think it actually helps me lean out a bit when I am on it.
Some people have said they've had a big increase in their appetite, but mine has been unaffected by it.
I tried a stack of Carbolin 19 / Alpha Male last spring and was VERY impressed with lbm gains. Gained weight, lost BF. I took the Alpha Male at 3 caps twice a day and Carbolin 19 1 cap twice a day.