You get about what you should expect. A pretty sharp, low cost DLP projector. With only a single chip, not 3 panels like 3LCD and LCoS projectors, there's no misconvergence to cause softness. That said, the HD23 doesn't seem to have the best optics around, and considering the price, that's fair.
That said, consider the HD23 projector to look at least as sharp as any of the slightly more expensive 3LCD projectors near its price, and it is certainly comparable to other projectors under $1000. That's not to say that it's the sharpest. For example we typically find BenQ's competing projectors to be a touch sharper. We're about to review the direct BenQ competition, the new W1070, so check out that review if you want to compare these sharpness images, when that review publishes mid-December.