The 33-year-old played alongside the goalkeeper last season, but has now joined Mark Warburton's Glasgow Rangers side.
Rangers' Joey Barton in action with Burnley's Dean Marney
The England goalkeeper played alongside the former Manchester City man at Turf Moor last year. And he has explained that having expected to be working with a controversial character, he was pleasantly surprised by what the 33-year-old was actually like.
Joey Barton during his time with Burnley
"Joey was incredible for us last season. Having not met him before he joined he came with a reputation," he told the Evening Times.
"From what we [have] seen it wasn't right. He was incredible on the pitch and he was incredible off the pitch. I can't speak highly enough of him."
Though his performances last season prove that there can be no doubt about the fact that he will make a huge contribution to Mark Warburton's side - he was hugely influential in guiding the Clarets to promotion to the Premier League - some Light Blues supporters may have still been concerned when he arrived at Ibrox.
There have been moments both on and off the pitch in the past when Barton's temperament has been called into question, and some fans may have been worried about whether he would be able to keep his cool for the Scottish Premiership side, especially in the heat of an Old Firm battle.
And while the derbies that Burnley contested last season were not as volatile as Rangers' clashes with Celtic, he demonstrated that he is able to maintain control in the games where the local bragging rights are up for grabs.
And if, as Heaton suggests, he has found that balance between inspiring his teammates with his fighting spirit and keeping his cool under pressure, then Warburton has surely secured the kind of leader the Gers need to move back towards the summit of the Scottish game.