Started out as a sword / dodger type. Breezed through everything until I got to the Ordo Team. Every other hit was a crit and if I didn't take care of the archer, I was dead by the end of the second round. Got frustrated, restarted with an archer build. Before each match began, I'd run to the farthest corner (the AI doesn't seem to engage you unless you are within a certain radius for a certain amount of time) and snipe my opponent, who'd waste two to four turns getting to me, longer if I hit him in the head or nailed him in the leg. I only had extreme difficulty in defeating the Hoplite and the Triari (who I only beat because they ran out of their axes before I ran out of my arrows; I still shiver at the crits these guys can get). One thing of note, however, is if I cripple the champion, he won't pull out his crossbow, he just continues to charge me, making for one hell of an easy battle as I plug him in the head and legs. If, however, my opening move is not to cripple him, he goes ranged and rapes me. Is this a bug? And I believe it has been mentioned by others too, but I've had some difficulty with crashes and corrupted saves (it seems to happen when I buy certain pieces of armor / weapons), and the like.
As for bugs: One bug which has been mentioned is my character somehow attacking itself, which happened to me twice. Another bug I remember is if you charge your opponent before a match starts, you'll be frozen in place but continue running towards him when he initiates combat, which halts all combat as he waits patiently for you to stop your animation and you continue to charge him. The last bug I remember is if you go to load your game after death and before the game over screen, the game seems to get confused and will return you to the main screen after displaying the game over text. This would be a minor annoyance, but it also seems to have a good chance of corrupting my save and crashing me on the next load I make.
Overall, it was mostly enjoyable, difficult, and sometimes frustrating affair thanks to random crits, and some bugs.