Currently $295 at Amazon to compare. This model is a step down from the WH1000XM2 ($348) with only minor differences. The 1000XM2 is more for frequent travelers and the 900N is geared for everyday use. It has 22 hours on full charge and the same touch controls.
There are a few in depth reviews on YouTube and they also compare the two models.
This is also available in stores. I tried the demo unit there and it cancels out the noise very well. Disabling the noise cancellation mode by placing your hand over the ear cup is pretty cool. Thinking of picking this up for a long plane trip.