I really, really enjoy the Minisuit I got from Amazon (where I also purchased my Prime & docking keyboard). Here's the item title, " MiniSuit ASUS Transformer Prime TF201 / TF700T Leather Keyboard Portfolio Stand Case Cover for TF201 Mobile Dock and Tablet (Brown) - LCD Cleaner Included". I'm sure you can find it easily doing a search on these terms if interested.
You just pop two snaps that are easily accessible and the tablet is quickly separated from the keyboard and just as simple to re-attach. It is made from beautiful leather (the brown goes very well with my 'purple' Prime) and there is no noticeable chemical odor. When all attached, I have had no problems with accessing the power, docking ports or cameras. I have only had mine for a little over a month and have by no means explored every need a user might have, but in my experience using it every day, in its suit, keyboard on, using the front-facing camera for Google Hangouts, I've had no problems whatsoever with the case. Also, the side of the folio that could hold a pad of paper is not only a good layer of protection but is also a very useful support for the screen, always holding it in place on my lap or a seat.
Jennifer