Yes.
There is no wifi issue with the public release.
There is no weird buttons config, such as the mute button. It is functioning as designed. That is, the mute button, which use to be the orientation lock, now mutes the system sounds. It does not mute individual application sounds. Muting of applications is still done the same as it always has been done. (Although, some of us, including myself, don't care for it this way. The button now works the same way as it does on the iPhone. However, the iPad is not an iPhone and there are a great many of us that use the iPad in totally different ways than we do the iPhone. While I understand wanting continuity between all the iOS devices, giving us a 1 step process for the last 7 months and then taking it away to become a 4 step process, has some of us a little ticked off. This was a bad move, imho. And, I believe they should have provided an option to keep it the same as it has been. This is the first time with any of my Apple products, that I'm wondering if they hired some folks from MS.)
I have not seen anyone report the issue of the iPod app not recognizing your existing music on the iPad. That seems to be relegated to the iPhone only and is easily solved. The music is still shown on the device in iTunes. Play a song or video from the device in iTunes, it will flash on the screen for about a second saying it's syncing and everything reappears.
Between folders and access to the brightness and iPod control without the need to leave an app, the upgrade is well worth it.