Once I got past the initial learning curve, I found ImagePrint to be one of the easiest and best programs in my digital photography armamentarium. As mentioned by a previous poster, get to know the Dashboard. Once you have it set up the way you want it, all you have to do is select the desired paper size and paper profile, position the image in the paper and then hit print. If you want to add color or tone, then a bit more is required.
My biggest complaint about the UI is that the preview image in IP is not of high quality. But no matter, because soft-proofing in Photoshop using the IP paper profiles is easily the better way to go. You can set this up with the IP Profile Manager. Again, once you have done this, soft proofing is a snap. The results definitely surpass what I can get printing out of PS, and the same should hold for Lightroom, as it uses the same driver.
Rob