Is it good? Yes.
Were there problems? Oh my dear yes. Plot holes and magical technology and deus ex machina, but nothing you might not expect. Well, the fingerprint thing was absurd to to the point of laughter, but nothing too hilarious.
Is it the best Batman movie yet? Maybe. It certainly could be argued.
Did Heath Ledger do well? Yes certainly.
Oscar-worthy well? No. Nowhere near.