I just bought a PN-40 and I am actually kind of wishing that I had gone with the PN-30. I had also been under the impression that the PN-30 did not support the direct to device geocaching options, based on everything specifying the use of the PN-40, so I paid for the 40. I really have no need for an electronic compass, can't beat a good lensatic in my opinion, and for my shooting hobby, I need density altitude, which I have a Kestrel 4500 for. I would have been quite happy with the PN-30, and would have saved the $100.