So I picked one up at Best Buy today. After about 2 hours it was back in the box, ready to be returned tomorrow. I think it's actually a great product, but for my tastes it just adds too much weight, too much thickness.
To provide some perspective, I'm upgrading from a non-Retina Mini. I bought that originally because I had the original iPad and thought it was too bulky to serve its purpose. Well the 10.5 pro with the ASK on it ends up being about the same size and weight as that original iPad. In terms of hardware design, I felt like I was taking two steps forward with the new iPP, just to take 4 steps backward by adding the ASK.
Even with that being said, I probably would still be keeping the Smart Keyboard if I didn't already have the Logitech K380. For my use, all the times I'll need to do a lot of typing I'll likely be home, so I'm keeping the K380 in a kitchen drawer. What's great is that keyboard is still small enough to bring with me in a bag when I do travel, but it won't be constantly attached and adding bulk to my new iPad. I get the benefits of the advances in hardware design, with the utility of a keyboard when I'm most likely to need it.