Just saw it and was bored. Although I'm a Civil War buff "Lincoln" is not my kind of movie. Too much talk, talk, talk and parliamentary procedure. "We must pass the 13th Amendment , "No, Abe its too risky! What about the war?" "No, its the right thing, Slavery must End!". Blah, Blah.
However, the acting is excellent and Sally and DDL deserve Oscars. If you liked "Amistad" or long-winded (to me) Biopics like "Ghandi" you'll probably like "Lincoln". Otherwise not.
Political films, of course, can be done well and be entertaining, see for example: "The Best Man", "The Last Hurrah", or "Advice and Consent". But "Lincoln" isn't one of the them.
Also, I was puzzled why Lincoln - in the movie - is so obsessed with passing the 13th Amendment in January 1865. Historically, everyone knew that in early March 1865 the Republicans would've passed the Amendment in the House of Representatives, no matter what. And that ratification was a sure thing. By January 1865, Missouri and Maryland had freed their slaves, and Slavery was on its way out in Kentucky and the South. Even Jefferson Davis was proposing giving slaves their freedom if they'd don a Confederate Uniform.
But despite my boredom, my hat's off to Spielberg. At least he tried to do a quality movie about a Great historical topic instead of "ET-Part II" or "Private Ryan goes to Okinawa".