^Yep. I always say this when the “traitor” thing is brought up (see my previous post on this page).
Lando is a hero who did the right thing and it didn’t cost even one life. And even if Han had died, it was to save an entire city and all of his friends. Worth it.
Also, take note that Chewie, Leia & Luke all trust Lando completely after they find out he isn’t a bad guy and just saved all of their asses. He then goes off to save Han, the only person left in peril. (Which was trouble Han made for himself without Lando’s involvement.)