Where pleasant in this case is the person replying took the time to read the words you wrote and confirmed that by prefacing most sentences with "so I see you're trying to do xyz", followed by a thorough and well thought out response with references and suggestions.

So many times I've emailed other places (multi-million dollar companies) where it's painfully clear the person replying didn't read anything and some tool scanned my email for keywords which they auto-replied with even though the response makes no sense based on what I wrote. Then it takes additional days and back and forths to get to the point where they understand the original email that was written, in which case it gets "escalated" to another support team / tier within the organization where the process starts again.

No option to reach a human by phone, chat, email. It felt pretty awful.

Edit: I should clarify that I mean Amazon retail. I don't use AWS, but I imagine it has much better support.