I purchased a Bluetooth keyboard which doubles as a case for my iPad. I have been using it now for a few months as it is one of the more rugged cases for the iPad that I have found. It can hold up to being smashed inside my tech backpack with quite a few bulky and sharp objects. The case slips over the display side so you end up with the aluminum backside of the iPad and the aluminum backside of the keyboard giving both sides solid protection.
This keyboard is really quite nice, I have large hands, it has small keys but after typing a few sentences to get used to it, I had no problem adapting to it for long typing sessions. It was easy to pair and it works reliably. Once thing I noticed is that the on-screen keyboard doesn’t pop up when the physical keyboard is paired, it will come up if you want it to, but it isn’t defaulting to the screen. I suspect this was the intention of Apple when they created their keyboard and docking module, so it is pretty seamless.
The keyboard/case has a MicroUSB port for charging its internal battery to run the Bluetooth radio, it has a colored LED next to the on/off switch – blue for normal, red for getting low on power. So far, the battery has yet to run out on a few full days of use and the keyboard has it’s own on/off switch, so when you are not using it you can be sure it is turned off. It also appears to have a sleep mode, I have forgotten to turn if off a few times and it still works days later.
While the case is covering the iPad it leaves room for the iPad connector to fit so you don’t have to take it apart to charge the iPad.
The keyboard has a plastic fold-out wedge that will support the iPad in landscape or portrait orientations and it is easy to manually flip and sit back in the keyboard resting groove.