We introduced a bottle at 4 weeks (LC suggested not waiting until 6-8 weeks). Well, it's been more than a month and the most success we've had was 2 oz. - once. I was in the next room working with the door closed. We've tried with me in the house (in the next room, like the time "we" had success) and with me out of the house. We've tried when she's not hungry at all, a little hungry, and very hungry. DH introduces the bottle, she gums it, maybe drinks a little, cries, then DH soothes her and they start the process all over again. My husband is nearly at his wits end with this. Unfotunately, it is necessary as I am a full-time grad student (like DH) and will be away from my daughter 2 full days/week (for class) plus I need to be able to go to the library for more than a 45 minute stretch.
Of course, my daughter is also the type who won't take a paci (though I know she knows how) and LOVES the breast. With the rare exceptions when she's in a super good mood (like immediately after waking in the morning). "At the breast" is the only place she's truly happy.
We haven't received any helpful advice (ranges from: "you have to be out of the house" - duh! to "if she's hungry enough, she'll take it" to "good luck, my baby cried for 8 hours straight and still wouldn't eat"). In my family all the babies take bottles easily and w/o nipple confusion. In DH's family no one would take a bottle so Mom had to be within 2 hours distance for 4 straight years. As for me, I did everything "right" - took BF classes, hired an LC, invested in a good double electric pump, purchased a myriad of nipples, bottles, and pacis, and waited weeks in order to avoid nipple confusion.