It is stunning!

I have been asked to make something similar for a wedding. Please could you tell me what buttercream you used? Did you fill it with fresh fruit and jam too? I am planning to do a madeira sponge with maybe swiss meringue buttercream or preferably cream cheese icing made from cream cheese, double cream and sugar, with added fresh raspberries but I am worried how it will taste once it has been standing for several hours.