I think the "exposure compensation" sim is pretty cool, but the general SLR one - the one with the girl with the pinwheel, isn't. There's no possible way to expose correctly if the ambient light is reduced to, say, bright indoors, and it's got out-of-date profiles for high-ISO noise. A modern DSLR would do much better at high ISO. It'd be nice to have multiple example images, and if I paid for it I'd want different lenses and flashes.