I have four black creams going now,and there stunning looking ladies. 3 have done the full on purple and one has purple stems and leaves but normal colour heads. The purple ones smell like a sweet shop i visited as a kid,really pleasant sweet candy. The non purple one has a smell that reminded me of jack flash from 10 years ago.Unfortunately mine have only been on 12/12 from start as there in with photos,but they still have more on them than the last autos i did that had loads more light offered to them.
All of mine are definite sativa dom in growth and head development.
Also got a cream caramel and 4 big devils in with them and there all very good,sweet seeds have proved to me there is a place for autos,even if its just throwing a few in with your photos to get some different flavours and colours going.
Id highly recommend getting them. Ill put a few pics up tomorrow.