It's kind've like being really tired to the point where you're dreamy, however you don't experience the angry side effects from sleep deprivation. You also get the munchies, any food is good food. You're a lot happier and get the gigs frequently.
The only downside I can think of is anxiety about other people watching/judging you in public, depending on the strain I guess as well.
Oh and you forget shit a lot.