It was a good idea the first time, and it’s a good idea now, although four discs worth of ’70s covers does seem to be pushing things to the saturation point.
GDFU have that warm, thumpity-thump, deep-dish groove, clear singing, and sonic/structural referencing Kyuss, Sleep, Black Flag, Sabbath, and Monster Magnet.
Greatdayforup writes snappy and memorable songs, surprisingly so for a heavy rock band, and stomps the fuck out of them with a brutally heavy non-metal attack.