Hotels do this all the time especialyl for wedding groups.

However, if you wasnt to check in early, this may make you wait, since they will have generally reserved a specific room and put the items in that room, so changing rooms or things like that could make it tough. You need to wait for prior guest to depart HKPG to clean room, then you can get in, so it may end up being one of last rooms celaned. But if you arrive after 5pm, you should be golden.