For me, it's a bit too sweet (could be the Heering) so I will love to try Difford's recipe next time. Also mine had a thin layer of foam on top of the drink, wonder if it was caused by the orange juice...?
Followed the recipe and the drink turned out to be slightly green instead of the yellow color with the photo, it tasted great nevertheless =)
I would probably reduce the Maraschino syrup to 3/4 shot (or maybe even 1/2 ?) but I still like it a lot. Thanks for the recipe!