Well, pleasant but not essential. It has been done thousand times better in the past (CAPTAIN BEYOND, SIR LORD BALTIMORE, BLUE CHEER, GRAVE, BUDGIE, BUFFALO, HACKENSACK, MEGATON, MADHASH, INCREDIBLE HOG, MOUNTAIN, ORANG-UTAN… the list is endless!).
If you need great, devastating, authentic 70ies sounding heavy rock, better look for ORANGE SUNSHINE, DZENGHIS KHAN, SIENA ROOT, GRAVEYARD, LORD 13, WITCHCRAFT or HORISONT. This polished, somewhat forced effort should be your 2nd or 3rd priority.