Yeah, they can be good...but very bad also...my friend got blind for about 30 minutes cuz of drinkin vodka and smokin marijuana at the same time...it can be shitty... And black vodka is good...
Well, it can be okay for you but I don't feel like that at this time of my life...so yeah, that's it...
EDIT:
Yeah, I know...we talked about it one time...I remember...it sucks...