Summary: I've been using my Blackberry Smartphone with the Trimble app for Geocaching. Being new to geocaching and to GPS', I found the combination to work quite well. The app costs about $6/month. I thought I'd try something more sophisticated to see if it was "better" than my Smartphone. Reviews for the PN-40 were pretty good so I bought one. It's certainly not for the beginner. I'm a retired EE and am quite computer literate. The instruction manual is poorly written.
Summary: Delorme needs to stick with what they do best (maps), fire their software designers and partner with someone who can make a more functional GPS! After considerable research, I purchased my first GPS, a PN-20, primarily because of Delorme's reputation for great maps. The PN-20's graphics were terribly slow, so I returned it and made the mistake of buying the newly-released PN-40.
Summary: I'm a geocacher and thought that this gps would aid in my hobby. The PN40 was useless. It eats batteries like they're going out of style, and when it lost the signal it would take as much as 40 minutes to get it back. I was in a deep search when the gps froze, thank goodness I had my 98 cent compass to get me back.
Summary: This is an over priced GPS. I called the company DeLorme and spoke with a technician and was told by him that lat/Lon positions could be imputed to go to that position. False. Download of maps is not only a challenge, but when done by the numbers there are errors which cause the maps not to be displayed. The best I can say about this GPS is that it turns on and off, and you can pinpoint where you have been.
Summary: I paid promptly and the unit took over two weeks to get to me. When testing the unit it ran through 6 sets of batteries!!! Hard to believe you didn't notice that? I sent it off to DeLorme and they fixed it was a hassle that should of been handled by original purchaser. DeLorme replaced the battery sender unit and I hope it will work properly now.
Summary: I started out geocaching with an original Garmin 60 GPS. That was a very good unit but I wanted something that I could download caches easier with along with descriptions. I was going to upgrade to the Garmin 60CSx but with the recommendation of a friend I purched the Delorme PN-40. The Delorme hasd proven to be a great gps. Overall is it a very fine unit that only has four issues in my book. First my biggest issue is that the screen is too small in my opinion.
Summary: We purchased this Delorme and a Garmin Garmin eTrec Venture HC GPS at the same time to compare them; I found that in forested areas the Garmin worked much better than the Delorme PN-40. It was much faster at picking up satellites, had better reported error, and cost half the price than the Delorme.
Summary: I purchased the PN-40 recently but unfortuantely had to return it shortly thereafter because it was a brick. This is a documented problem (Delorme Forum) that Delorme does know about, but it apparently hasn't be corrected as of yet. I got the unit specifically to use on an upcoming road trip since I'd be doing lots of hiking, so I was sorely disappointed when I couldn't get the unit to stay running.
Summary: Bought this for my engineer husband for Christmas, because it seemed to be the top of the line and come equipped with more maps than others. It lasted 3 months then died completely after no ill use. In the process of seeing if the company will give us a new one. If so, I'll revise this review. Until then, buyer beware! Edited review: we very kindly received another unit, however, it had a shorter life than the 1st.