Nice Pink Floyd territory. I'd bring the lead vocals up just a bit. Actually, more than a bit.
I hope the guitarist is getting paid more than the drummer, because he/she sure is doing a lot more. I think some busier drum fills in occasional places would help, even in a slow-tempo psychadelic dirge, it's nice to give the drummer some.
Overall I'd say this song works! Reminds me of a previous era, which was, ironically, a long way back. :)
cheers,
-Tom