I'll have to give them a listen. Been trying to find more music of this genre recently. What album would you start with?
Are you asking about stoner in general, or this band?
I have Earthless' Rhythms Cosmic Sky from 2007. It's good-but songs are sooo long. Like Stevie Ray Vaughn on acid if he just kept playing a continuous guitar solo for 30 minutes straight...Led Zeppelin has some live stuff like that-these ridiculous medleys that approach 30 minutes-cool in that you get the concert vibe but feel indulgent-to me anyway.
I lump stoner into the whole retro rock thing-The Sword, Witchcraft,
If you want to investigate the origins of the genre....
there's plenty of more bite sized songs
if you haven't heard Kyuss Blues for the Red Sun or Welcome to Sky Valley-I would start with those two. Those are the most classic to me in all of stoner. I really like Welcome to Sky Valley.
Fu Manchu has a fuzzed out classic (well several) called In Search of... which is killer. Fuzzed out riffs that sound so fat you can almost see them through bong haze.
And, I would add Monster Magnet's classic, Spine of God. I'd add Power Trip and Dopes to Infinity. I'm a big MM fan.
Those three to me are like First Generation in BM terms.Kyuss, Fu Manchu and Monster Magnet.
Nebula is good, too. They were started w/ some guys from Fu Manchu. Actually, Eddie Glass who writes most of Nebula's music and sings and plays lead guitar played on In Search Of. Nebula have a bit more of a punk edge mixed in their stoner. I would recommend To The Center and Atomic Ritual. Great psychedelic punk tinged hard rock. Great riff rock, vocals not so much. MM and Kyuss seal the deal in the vocal department.
But, there's some pretty good newer stuff as well. I would throw the new Clutch in the stoner genre. And stuff like HOF that crosses into extremity.
It pays to be selective as stoner can get repetitive. But doom is where the action is now. I'd then throw in some stoner doom classics like Sleep, Pentagram, Spirit Caravan (anything Wino's done-kind of the Lemmy of doom), Electric Wizard, YOB, MDB, UFOmammut and the list goes on.
But, I may have misunderstood your question...