I had mixed reactions to it. I thought it did some things really well - the burning of Washington and the defense of Ft. McHenry. The re-enactors were a little too clean and shiny to be believable, but that's almost always a problem with such projects. And I liked the actors who impersonated the famous people. The Andrew Jackson actor looked just about like I visualize the real Jackson of that time. (In the movie The Buccaneer, Charleton Heston made a good Jackson but they made him up to look like the guy on the $20 bill - about fifteen years older than Jackson was at New Orleans.)
But it sure left out a lot. The naval war barely got mentioned. (A minute on the Constitution vs. the Guerriere, some references to privateering, quite a bit about the British fleet in the Chesapeake, and a couple of sentences about the Jeffersonian gunboats that slowed down Packenham's army before New Orleans. Nothing about the other frigate actions, or the Battle of Lake Erie, or the Battle of Lake Champlain.) The story of the campaigns around the Great Lakes got dropped in midstream - and one of the graphics seemed to suggest (vaguely) that the British advanced across the Lakes and well into Ohio and Indiana. That, of course, never happened. The causes of the war barely got discussed; the political ramifications (e.g., the fact that the Federalists blamed the whole thing on the Republicans - not without reason) were referred to only in passing. There was, for instance, virtually no mention of the fact that Jefferson's embargo did far more damage to American foreign trade than the British blockade did.
I found myself wondering if the thing perhaps had been edited too heavily, in order to force it into a 2-hour (minus commercials) time slot. It would have been a better topic for a mini-series.
On the other hand, it was so much better than TV historical documentaries used to be that complaining about it is probably sour grapes. The historical analysis was pretty good (though to my taste they inflated the idea of the war as a great American victory a little too much), the narrative was sound, and the computer-generated special effects were great. Shows like this, and the "Decisive Battles" series that's also running on the History Channel, make me slightly less pessimistic about the fate of history as it's presented to the public. If that show gets some folks interested in the War of 1812 who otherwise wouldn't be, I'm a hundred percent in favor of it.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.