Summary: Recently purchased a Garmin 60CSx GPS, which is worthless without mapping software. My first purchase was MapSource Topo U.S. 2008. These maps are indispensible for anyone who enjoys 4-wheeling, ATVing, dirtbiking, mountain biking, hiking or geocaching. The program was extremely easy to install on my laptop and uploading maps to the GPS is a cinch. A 2GB micro SC card has more than enough storage.

For fun, we ride off-road in the western mountains and deserts for hours at a time. Of course, we always bring a compass and paper map for safety reasons, but having Topo 2008 installed on our GPS makes our trips more enjoyable and interesting. It's wonderful to have so much information in your hand; terrain and contour, elevations and distance, points of interest...I could go on and on. It's a great off-road tool. In our case, we don't leave camp without it.

Summary: Purchased Garmin's GPS Map CSX to use for hiking, hunting and biking. Since I travel alot, I purchased Garmin's City Navigator (which is a great product). As an add-on, I bought TOPO US to use as a locator while out roaming in the woods hunting and fishing. Got lost once in the woods at night, and that'll never happen again using the tools on my GPS. TOPO US adds contours, logging roads, hiking trails, city streets and country roads but does not have routing capability. The position of the roads compared to topo contours is off a little but still very useable.
A great product but wouldn't pay full price for this software. Purchased TOPO at Amazon for $59, was delivered in 4 days and loaded onto my 2 gig micro SD card in about 2 hours. You need a big SD card to load all US topo.

Summary: I have had a vehicle GPS for some time now and thought that this dvd would add some routing capability to my handheld portable - no such luck. It does add the topo grades, streets, and land features that make it a little easier when wandering about in the woods, but I would not pay $100 plus for it! For some strange reason, if you do a search on Amazon you can pick this up for $59.01 with free shipping! Add the pricegrabber review bonus and get another 5 off the price. Just do a search for 010-11001-00 (that's the Garmin part number) in ELECTRONICS at Amazon. I thought it was a price mistake (and maybe it is), but it came in 2 days and my net price is 54.10. I'm not sure how long that price will be good for, but at that price, this dvd is worth it.
As an FYI, you will needs >4gb to load the whole US, so you'll need to be careful as to what you load onto your unit. Obviously, this is best for a handheld that takes the microSD memory cards or you will be loading and unloading quite a bit. It took well over an hour to download about 800MB to my 60CSx.