I finally got around to connecting my keyboard to my IPAQ Rx5915. As mentioned by nearly everyone, I had to download new drivers to get it to work. Then I had no problems.An Amazon reviewer mentioned that the keyboard has an unpleasant wobble and rattle when typing near the ends because the ends are not supported. He had made a cardboard support when fixed the problem. I was looking for this note (didn't find it) to see what refinements he'd made. In experimenting, I discovered that by placing cardboard under the PC stand to raise it up a little, it ended the rattle and most of the wobble. I haven't figure out how to attach the cardboard so I don't accidentally leave it somewhere, but I guess it's replacable.The keyboard seems stable enough in my lap, and I found that if I detach the pc stand, it supports the PC while I have the kb in my lap.Anyway, it's not perfect, but it's way better than using a thumb keyboard, or worse, the on screen keyboard with a stylus.