We were advised to use a crate from the onset.
Tegan now 10 weeks has been in her crate since day 1 when we picked her up at nearly 7 weeks.
First night she cried on and off through the night and then from then she has been as good as gold every night since. We call it 'bed' and on the command 'in your bed' she gallops to it and gets a treat. Normally in at 11pm and there until 6.30am (our choice not her's

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it is her space and during the day the door is left unlocked and she has now learned to come and go as she pleases which is a good thing. The only time she is locked in is when we are out and need to leave her at home (at the mo not more than 2 hours) and through the night.
We put plenty of toys in the crate with her to keep her amused and especially the Kong stuffed full of treats.
We dont put water in at the minute but will when she is older and properly toilet trained.
Since day one she has never wee'd or poo'd in her crate and don't expect her to. I think she has learned to cross her legs until we either get up in the morning or return home