by playing with the demo a tad, it seems nice. the code it generates is quite clean and much less bloated then most generators would make. however, in the playing around it does seem to have its quirks, and you gotta learn how to use it and how to trick it into making some stuff kinda, and you really need to know how to use photoshop quite well, while also understanding the basic functions of webdev type terms.. and what little extra commands you need to add (-button, -text, -rollover, etc)
my overall opinion:
great for photoshop guru who doesn't like programming. This will make a decent quick site thats static, just a couple pages but very prettyness over full on functionality. Afterall the main point of this is to not need to go into programs like dreamweaver as often, so anything over like 5-6 pages could start to be a pain. also some of its choices arn't very efficient, and my slice jobs are much better, cut down required images, etc
course thats just playing around a bit. but i do web development/programming as a summer job sooo... /shrug
i like the code more then the photoshoping. my job ranged from slicing up the mockups into real pages (basically what this claims to do) to create templates, pull database stuff, do updates, etc etc.