I've never heard of an opera cake, but coffee, chocolate and almond are a hit with me! I can't see anything about this cake to dislike. I'll have to check for a recipe. It's unusual for me to find a cake that I haven't even seen in a cookbook, but that's the case with this one.
Sponge cake isn't that difficult, and neither are ganache or coffee syrup, so none of the components are particularly labor intensive.