While I don't have the as much pin experience as some guys, I found and still do find my BF to be very challenging.
Took me like 2 months to get on the high score list (where I still only occupy 1 spot out of 6)
The multiball build up is great (especially with a subwoofer), too bad when the flashers and music comes on to hit the multiball start shot I usually choke when I have a high score.
The novice mode is nice for kids(and my father, lol) too.
With only 1500 made there aren't many out there.