Anyone interested in IR photography should check out Richard Mosse - The Enclave, a photography exhibit and experimental documentary. Its far more interesting than the Phillip Bloom experiments. It was shot on Aerochrome film where IR light Takes the place of the red channel (with red and green shifting down and removing the blue channel) so its much closer to the way in which our brains would process IR as a color.
Camera placement is really important. If the thing you are keying is going to end up being small on the screen, the prospective will match better if you shoot it further away. Matching the angle, hight, placement, f-stop, and focal length of the shot you are compositing onto is important.
I would be interested in this camera only if it offered false color infrared, similar to how the film stock Aerochrome worked. I really love the visual effect it produced and still occasionally shoot stills with it. The problem is that 24 exposures of that stuff costs $35, and its expired film. Getting a false color infrared camera would be worth my money, but if its just black and white, I can't seeing have much use for it.