It is much faster, more stable, configurable and easier to use than I have known.
Intelli J is a commercial IDE and we will not compare it to Eclipse in this article. I myself have tried Netbeans, compared it to Eclipse 3.0 and never came back.
But the Netbeans that Eclipse is fighting now and the Netbeans that I have tried are simply too different.
Moreover, careless release (Juno 4.0) made Eclipse slow and hangup often.
I did not recalled restarting Eclipse in the past but that happened to me once or twice a month now (I am using Eclipse Kepler 4.3).
Eclipse interface is still very flexible and easy to customize but the recent plugins are not so well implemented and error prone (I am thinking of Maven, Git support).