Yes I absolutely agree with, classy is also not selling stories to the press about Harry & his family.
I'd imagine Chelsy has plenty she could say about her private, personal relationship with Harry & the Royal Family but never felt the need. I think that's firstly a sign of Chelsy's character but also shows a lot of respect for Harry & The Royal Family.
He did speak about her in Spare (did he need her consent??) but he spoke about her so warmly & lovingly, she was one of the only ones & Cressida who he spoke positively about.
He invited her to the wedding, she attended & looked beautiful. Classy, amicable break up.
What's not classy is sending your rings back in the post to your husband who you decide to divorce a couple of years after your dad paid for your wedding... not a classy break up!