Not much that I noticed, guitar playing was good, didn't notice any missed notes or slips in there, singing however, sounded a little bit out of key, I never heard this song before, but a few of the notes just seemed a bit "grinding," especially some of the higher ones. But props to playing guitar and singing together. =D

Bass seems to be kind of boring, make him just try to be a little more charismatic and have a bit more swagger, just so he can have at least some attention :P