I don't know if I have a defective unit or people are just vastly overstating the iPad pros capabilities.
It's a little better than my iPhone speakers (but not even earth shatteringly so), and it's not better than my 15" MacBook Pro and certainly inferior to my tv soundbar (which can also function as a Bluetooth speaker). 4 speakers means you're less likely to muffle sounds with your hands when holding the device, I'll give it that at least. I just can't see how this level of sound quality would be a driving factor for a purchase :-/
Not tying to be inflammatory, I'm genuinely perplexed.
I'm finding them vastly improved over previous iPads, especially for movies, music and games. System sounds still sound really low.
That said they are still not going to replace an external bluetooth speaker.