Best carriers for twins?

I wasn't sure where to post this, but I was wondering if anyone has any thoughts on carriers for baby wearing twins. When mine were little I used the moby, so that's all I have experience with. A friend is due in November with twins and I was trying to come up with gift ideas and baby wearing came up in conversation.

Sorry if I posted this in the wrong thread, it's been a while since I logged in and a lot has changed!!