For those saying Jara doesn't have the ability to 'blow up' and get a red card from nothing, I think you are wrong.
Granted, his stats say he's not too rough a player. With us I believe he got 1 red card, possibly 2? But, if you actually remember, he was often very lucky. I specifically remember a few times when I thought "God, he's lucky the ref never saw that" as he'd do too many reckless tackles and lose the plot.
As for his quality, I think he is premiership class - but Reid, and possibly Jones are better. His main fault for me is that he looses position too much and wanders up the field, resulting in goals from him being out of position.