Used it for my training years ago. There's sound of course, but never had a difficult about the communication. As it covers the ears noise must be reduced at a level, I just don't know how much it affects as I never used another headset. My friend was using the same headset with noise canceling, in my opinion if you ever buy one go for it with a small price difference.
Nowadays I use the Sennheiser the company put in the plane at my job. It also doesn't have noise cancelling. No problems with communications at all though. I tried my colleague's Bose A20 once, it has active noise canceling, even passive it reduces the noise a lot, when he switched to active no sound left at all. Best in the market as I know.