Fab thread! So good to hear everyone's experiences.
My non-id boys are now 6.5 months. No new advice as such but wanted to add lovely things specifically about bfing twins:
Tandem feeding really helped the littler twin get to grips with bfing in the early days as his brother would get a good let down going so he didn't have to work so hard. Really helped him gain the necessary weight to get going himself.
When you feed both in the rugby hold they are looking straight at each other. They really seemed to bond because of this and started interacting much earlier than my two bottle feeding friends' twins of the same age. They are still now much more affectionate and chatty (babbly) with each other. (It will all even out as they get older but it's very sweet to see when they're so small).
Bfing meant I had my hands free to do things with DD(3) and DS(11). zimmy has eloquently described how useful this can be! DD and I could still do crafts/read books etc. I don't think I could have done this with bottle feeding.
Once feeding is established, the ease of bfing - esp for night feeds - is something you'll be doubly grateful for.
You really can scoff all the cake your heart desires and the baby weight will melt off!
Disclaimer: It was hugely demanding in the early weeks and, with multiples, I think you need an element of luck for it to work for all of you. while it's lovely, none of it will matter in a couple of years time so if bfing gets scuppered by hospital stay etc there are still so many fantastic things about twins.