[icebraining]

The noise inside the bus seems quite annoying: https://www.youtube.com/watch?v=XEKJSMqhYKk

[Tade0]

I've been in one of these. The noise is noticeable but not nearly as offensive as a diesel bus engine revving.

Also there's no idling that would normally cause vibrations.

[Reason077]

Yes, it's a much more relaxing ride compared to a diesel bus. Smooth and quiet.

The noise seems to be exaggerated somewhat in that video - in real life it's pretty subtle.