Are these pictures of more than one plant or just one?
Some of the pictures the buds look more done than others.But in any case, IMO - I would wait before taking them down, they don't ready to me.
atrain hit it on the head though with checking the trics....however, take into account that not all autoflowering strains will amber, so in reality you should judge the 'ripeness' by the age, when you switched to flowering nutes, trics and pistils.