Ok, I saw this a couple of weeks ago...it wasn't half bad. Dealt with the fabled 'lost' Roman legion, the 9th...this is the third movie in the last few years that has tackled this particular story.
The Last Legion, starring Colin Firth
Centurion, starring Michael Fassbender
And this one. Centurion is the best of the three...I would say that Last Legion is 2nd, if only because they wove in the Excalibur/Arthurian thread which made me pay more attention.
All in all, this was an entertaining movie to watch, with decent action/fight sequences and decent acting; the armor was not horrible...the weapons were attractive to my eye. I like the difference in look and aspect of the weapons and armor between the indigenous Picts and the invading Romans.