Hugs Liz, I know you wanted to bf. Don't know anything about nutramigen but hope it's working for him.
I've had the opposite of your experience in that I am breastfeeding my second baby after having formula fed my first. Definitely BFing is 100x more convenient having everything you need with you all the time! Bottles are a pain to assemble, wash, etc as others have said. But I do get why they are 'easier' too. I feel much more uncertain about feeding DD2 than I did with DD1. I find it hard not knowing how much she's had, and when she's cluster feeding and it goes on and on and on I don't know whether she's hungry or just using me for comfort. When she's fussy or gassy I wonder if it's my milk or something I've eaten, even though I'm pretty sure she's fine and just getting used to being in the world. I love seeing her grow and knowing I'm doing that, but on the flip side BFing makes me feel like all I ever do is feed her and that's what she associates me with. Other people can hold her and she's settled but with me she's always rooting and I find that frustrating. I feel like a milk machine, whereas with bottles anyone can do it. I'm happy that BFing is going well this time, but it's a love/hate thing for me at the moment and I do understand the appeal of bottles.