Theres so much conflicting stuff on the internet. I have been in hospital with people with weed related psychosis, but there were also heaps of people that it helped.
Doing it every day to the extreme is not healthy, but doing that with anything is unhealthy.

Personally I see both sides, the good and the bad, so far for me it has been good - given me some time to chill out from my brain. But for my partner its not been so great, he cannot control his smoking or spending and is now in a lot of debt, trying to fight his way out of it. I prefer it to alcohol, I have much less side effects from it.

I dont see any problem with using it recreationally, but Im no expert. I feel the "weed is evil" mentality comes from it being against the law more than it being an evil drug.