Ben was in cloth from the moment his first nappy was put on. Sadly he wasn't allowed to use cloth for the time he was in SCBU (the 2nd day of his life), but the rest of our long hospital stay (we both came out when he was 9 days old) he was in cloth nappies - sometimes these were done up when he was allowed out for cuddles, other times he had cloth under his bum in the incubator, until he started to wriggle around too much as in rotate 360 degrees so we went to just using cut up strips of the inca pads (what the ladies lie on with diamonds on
He has only worn disps 4 times since he was 9 days old - 3 when I wondered if his sore bum would get better (it didn't) and the other when water had leaked all over his cloth in the changing bag and at the very bottom was a disp.
If you want to know more I did a whole long newborn nappy review in the review section and Beck has her newborn in cloth too.
Oh and he was known as eco baby with funky nappies by 1 midwife and another was pleased we weren't adding to landfil. As long as you are the person changing the nappies and responsible for your baby there is no reason why you can't use cloth IMO.