I paid quite a bit (around £80) for Starry Night a few years back and indeed this is a very good program especially if you use it for logs or linking to a scope. However, I'd never pay again. I find the software overly slow and Stellarium is just as good - if not better in many ways. However, if you've got SN working giving it a proper go - but I'd seriously recommend having a play with Stellarium, the price is right and you'll probably get a more intuitive view of the sky. Of course - you can always use Google Earth and press the sky button. That's quite good but not quite right.