Kinda good? Kinda not? It really depends. Like frying tons of bacon in the house and the smell lingers? That gets kinda gross, but if I smell bacon on a breakfast sandwich or something that's so good!
It's a nice smell when it's for the banana, but banana tends to overpower everything if its in the same bag. So the smell and taste absorbs into everything. Having banana flavored everything isn't the greatest. So depends.
I don't bake with coconut a lot so I'm having a hard time remembering the smell. I'm going to go on a limb to say I don't hate it and that it's fine/good! Some smells when baking are just more powerful (and not always good) Like cinnamon smells so good at autumn, but frying a bunch of bacon is kind of gross when it lingers.