I wonder how effective this pod really is when comparing other inert gas delivery system. They mention pushing a button inside the pod to start the gas to filling the pod. I would imagine that the pod would have air inside it before one decides to push the button, all that air would have to be replaced by nitrogen pretty rapid. It would be pretty noisy being inside it and they would probably need bleed valves to push the remaining air outside of the pod.
Or they would release the nitrogen slowly, making you groggy and finally making you fall asleep. The disadvantage of doing it slowly would be the symptoms of hypoxemia could surface depending on how fast the method is, headache confusion, coughing to name a few. Then the obvious SI you would have to fight being there are no locks and can be aborted at any time.
The biggest advantage i see is way less claustrophobic experience compared to an exit bag, but I would argue that a face mask is not that uncomfortable and way faster.
But I can also see the more slow experience of the pod being something positive since you will have time to think and reflect on your destination while inside waiting for your doom. It may also give you time to say your final goodbyes if anyone is witnessing it.
Edit
I found a source saying it would take approximately 10 min to lose unconsciousness. I don't think the experience should be that loud being that slow and it would rather be a matter of find the courage to wait 10 min. With the price of the pod and the amount of nitrogen they would waste aborting, I would have no problem finding courage.