It's very good. I have 4 copies of it and am selling two since two of my sites have really taken off and take up all of my time. I've also unfortunately had to move to MS based machines thank to work. I'm selling them for $295 each license (regularly $500) which comes with 4.51, the new version and with a free upgrade to 5. You can actually program php scripts in the templates! Right now unfortunately there is little that comes close.
You can write me via private email or at firstname.lastname@example.org if you are interested or want to ask questions about the product.