A very deep game but too stop start for me and lacks real flow and speed to keep me entertained, although the powerball is cool. Over-rated and until recently over-priced but then again I have never been a big fan of Lawlor pins.
TZ has dropped in price quite a bit in the last year or so as have most titles, you can pick up a good one for 4k-4.5k these days no dramas at all.
If you haven't played one....... play one first to gauge your own experience and avoid visiual pinball imo as it gives no real indication of how a real machine will play.