Ok, here are my problems with the dock for the Transformer in general. First of all, I am very disappointed with the fact that Asus makes you buy a dock to have access to a usb port. I feel that paying $150 for a keyboard is ridiculous when you have to pay $500 for the tablet. You can get a USB dongle, but you can not charge the tablet at the same time. My advise for anyone buying this tablet is that if you have a BT keyboard, use it and wait for the price to come down to a reasonable price. That being said, the keyboard is built for android which means you get special keys built for the android platform. I am using an Apple wireless keyboard to write this and it works great, no delay, and most keys work except the ones designed for Mac like the volume keys and brightness. If you do plan on using a bluetooth keyboard with the Infinity, then you will need a free app called "BlueKeyBoard." If you are thinking about getting the prime dock then you should be aware that the are a few slight differences like the difference in battery capacity, the infinity dock has a larger battery, and the way the tablet actually fits into the dock. I have also read that with the prime dock the top heavy feeling is more pronounced causing the tablet to have a tendency to fall backwards when it is on your lap.
There are some cases that will accommodate both the tablet and the dock; however, I don't really like the way these look. I feel like they look cheap and also add a lot of bulk to a device that's main selling point is it's sleek sexy design.
I first bought the TF300t and the dock together and to be honest I really did like the way they worked together. I did end up taking it back to Bestbuy bc I found out the tf700t was coming out. When I went to purchase the TF700t I just had a hard time justifying $150 for a damn wireless keyboard. I mean, come on! There are also a plethora of new tablet coming out in the next few months that will not only have similar spec to the infinity at the same $500 price range but that also includes a keyboard. Knowing this, I am seriously considering taking this one back to get one of the rumored tablets coming out in the next month or two.
I have been closely following the android tablets in development for about the last 3 months and the Infinity should have been the end all to the best tablet on the market. Asus' decision to move the usb port to the dock only as a ploy to lure ppl into buying a dock was a serious mistake. If it had a usb port on the tablet, no one would be able to compete wtih it, but they got greedy, and that will be the downfall of this tablet.
I really went with android bc Apple limits how you can change the user interface, and also it only has one port, a damn proprietary port none the less. Don't get me wrong I do like apple, I own a 15" macbook pro, but the ipad will never be an option for me.
Sorry about the rant, I hope this helps you some.