our little bubs is EBM and FF and it doesn't really take that long at night - all her bottles for the night are prepared and placed in the fridge, When she wakes they get heated to room temp. It prolly only takes me a few mintues to get a bottle at night.

I do admit it would be alot easier if she would attacth then i wouldn't have to leave the room at all.
As for sleep we get about 8hrs a night at the moment - thats with feeds.

I think its like most have said it really depends on the baby.