Yep, it might sound not-doable, but when its on you can see how easy it is!!

I was feeding Harmony in it the "wrong" way at the end of a train journey, and had to get up off the train while she was still feeding. I just cradled her with one hand, and held the strap over us with the other, so it didn't fall down. Easy. I couldn't walk for miles like it, but it still works fine!