I have done both, FF with one, and BF another.
The problem with my BF the first was my mind set. It was all a shock, time consuming, felt too trapped, could not get into a rythum it, expressed, got milk all in a mess. Lasted 8 weeks FF and BF then phased it out.
Second time round gave myself a target of 3 months, possibly mixing again, but second time round, as I know what to expect, better prepaid, had ELC this time too, I BF, no expressing even, and am still BF now.
I have found it so much easier, we have a routine, but its not around feeding...it doesn't need to be, when she is hungry, she feeds.....she still sleeps when she is tired which is at roughly the same times each day etc. So much easier at night to put on boob than faff round with bottles.
If you can do it, I think your doing yourself a favour as much as the baby, however, as someone who has done both this is not a criticism to the FF feeders!