Unlikely to leave a mark on you.
"My Coco" is to music in much the same way that Rivita is to Kingsmill Thick Sliced Nice'n'White ... Gold. It's edible (or listenable, if we're reverting back to the idea of the song), yes, but it's a lackluster substitute for the real, tasty, metaphorically-meaty thing. It has a few fans, yes, but the majority of the population know that it could be a lot better.
The music is very similar in ilk to the Proclaimers, or various other forms of folkish Scot-rock, and the vocals here are simply insania - or insane, if you don't dig the pop music scene. Of course, this is certainly different to what we're currently used to in the world of rock, but I doubt the world is ready for a Big Country II.
Look up "My Coco" in a thesaurus, and the following synonyms will greet your eyes:
average,
similar,
nothing special,
the hot beverage drink belonging to me.