This is a lovely cheesecake and as an American I can attest to the superior taste and texture of Philadelphia cream cheese. I like your addition of the caramelized walnuts to add a crunchy texture and nutty flavor to the dish. My only issue is that you said that the caramelized sugar was a little burnt. I appreciate your honesty, but I learned a lesson long ago from a fellow American named Julia Child. She said “No matter what happens in the kitchen, never apologize”. The true is that it might be a little bit beyond caramelized but, you made this dish with love for your guests and they will appreciate your efforts.