Building muscle and cutting fat at the same time is really, really difficult. Larger folks (read fat people, such as myself) have an easier time of it but it is still not easy. How strong do you feel? Can you dead lift more than your body weight? Can you do pullups? Are you close to your "ideal" weight? Lots of questions that you must answer for yourself.
Personally, I love IFing. I feel much more focused throughout the day.
Male, 32y, 6'0" tall
SW 306lbs (6/1/12)
CW 244lbs (1/17/13)
BP down from 120/80 to 110/74