Haimer Zero Master vs Passive Probe

I was thinking about getting either a Haimer Zero master or the passive probe. Does anyone have experience with either of these?

Also, what are the differences between passive and the digitizing probe? From the specs, I can tell that the digitizing probe is more accurate. I don't ever expect to need more than +/-0.0005" of accuracy tho, so the active probe seems unsuited for me needs.