i personally love them. its Janne Warman from Children Of Bodom and his little brother on guitar. they do amazing music. heres some songs

The Evil That Warmen Do: http://youtube.com/watch?v=_M_KIOQLkbk
Salieri Strikes Back: http://youtube.com/watch?v=paORvk9dSA8&feature=related
Beyond Abilities: http://youtube.com/watch?v=YtUcllgYJi0&feature=related
Somebody's Watching Me (cover Feat. Alexi Laiho on vox): http://youtube.com/watch?v=nPp8EMvdiRs&feature=related
Fire Within: http://youtube.com/watch?v=wML8qNZtk6k&feature=related


they're mostly instrumental but they have different vocalists come in and do tracks with them