I was inspired by the Staley/Cobain thread to post this. Lots of out-rage over Leto releasing this video
Thrash Hits simply said "F--k off. Seriously, Leto, just f--k off".
The Press posted a comment by a Nirvana fan which said "This makes me physically sick. I think it's pretty clear to anyone with even a passing knowledge of Kurt that he'd have found this 'performance' and talk of a biopic entirely repulsive. 30 Seconds to Vomit."
Personally, I see Leto as an actor (a fairly good one), and I view this as Leto trying to get a role, with perhaps a larger more personal motivation of 'I would love to be Kurt Cobain'.
It's not a terrible impression, regardless of your perspective.