It makes great looking maps from what I've seen, but I've found great looking maps are just neat, not useful. As the DM I'm the only one who gets to see them. Even if you were to print them and use them as battlemats, you would have to find some way to keep the hidden areas covered. (and take an extra job to pay off the paper/ink)
I've tried the 2nd monitor approach for a while and decided that it didn't work. The players seemed to like it, but their role playing disappeared. The display was the only thing they focused on, and they would search the image for clues. Like if I scanned in a map and hid the secret doors and room numbers using photoshop, the players would sometimes spot the slight inconsistancy in the image and go to check it out. So it really sucked that way. Also, it was a lot of work removing DM stuff from maps. Now I just use a whiteboard on the wall behind me and I sketch what they see giving rough estimates of distances. I still have the 2nd monitor there, so I can display images (like the monster they are currently fighting), but haven't had time to get images together for each session.
I think my DM style is moving towards less work for the DM by focusing on ways to improve the game, and my experience with displaying nice maps didn't work for me.
I have to agree with DSC-EricPrice, online DM's who use map revealing software will get the most out of this.
Now had the entire package with art cost $30 or less I would buy it just for the occasional use. But at it's current price I'll pass.