I like the fact that it has a system 11 feel but has some great features that certainly are not included on any system 11... Stacking multi balls for higher jackpots was a new thing in pinball at the time it came out. Also, the movie is not bad at all. Killer video mode, the sounds are really good as well. As far as I'm concerned, BSD has some of the best dots ever created in all of pinball. Also has one of the coolest toys in pinball. End of ball carry over bonus was a nice throwback to some of the great 80's games that had that feature. LEDs allow for some really creative mods. Lightning flippers make it harder for certain. Some like that fact, some hate that fact. The game actually has a similar layout to Taxi when you think about it. Probably why I like both games a lot.
For what they sell at, I think it's the best value in pinball right now.