Yeah, it is far too sour with equal parts. Should've read the comments. Also, I got an orange colour, no red/pink came from the cranberry. Could also do with some sweetness.
Tried it with Benjamin's recipe and it is much better, though still not great. It just mushes into one another. Still a good low sugar driver's option. I think it is just that bit better with mandarin juice, which is what I used.