Been using noise cancelling headphones for the last four years and they make working in a open office a lot better.

I just wish people wouldn't tap on the shoulder when I have headphones on. It's a sign of "I'm working on something, go away".

Btw. NC-headphones are not complete solution as they can pass nearby human speech through quite clearly.

That's why the music on top of NC is great but there's times when one doesn't want to listen music and then some white noise or waterfall sounds can be really, really useful.