Summary: I just purchased the Dakota 20 along with a few accessories. I read through the user manual on line and reviewed the list of accessories on the Garmin site. I bought a 16GB Micro SD and a Garmin battery charger that connects directly to the unit via USB. Be aware! The unit will not even read the 16GB card. The most that can be accessed and used is a 4GB card - so don't be fooled (like I was) into thinking you can store a load of data on a bigger card.
Summary: I recently decided to start spending some time geocaching with my son. I finally settled on either the Geomate, Jr., the Garmin Dakota, Garmin Oregon or DeLorme PN-40. I asked questions at forums, looked at on-line reviews, checked out the ones I could find in stores (Oregon and PN-20) and finally decided on either the Dakota 10 (a great price on a bundle was the big attraction at the time) or the Oregon 300.
Summary: I have bought and used Garmin GPS for like forever. They are great for most applications. I have used the GPS 12, GPSmap76 ,Nuvi and the latest one I got is the Dakota 20. Out of the box it was great. Small and really portable. Nice screen, a little dim though but nothing to fret. Visibility is ok. 2 problems I faced though. 1. Software suddenly went missing. No longer able to boot up. Had to send back to Garmin for repair. Only 2 weeks of usage.
Summary: After losing a Garmin etrex vista hCX which I loved, I decided to go with the Dakota 20 (D20). I will be comparing the two in the review. Maps and Storage: The D20 comes loaded with a basemap, which has most major highways, but no streets. So for your purpose, you can choose City Navigator (required for auto navigation to work), or Topo 2008 (shows mountain countours & most lakes). Luckily, I had both Topo and City Nav on my computer.
Summary: Warning: despite the name "Bike and Hike Bundle" this device does NOT work with the Garmin cycling accessories like Speed/Cadence sensor and Heart Rate strap. They crippled it. The next model up, the Dakota 20, DOES work with the bike add-ons (but is not offered in the "bike and hike" bundle). Bizarre marketing decision by Garmin.
Summary: First Impressions: This unit has some nice features but the one thing it does NOT have is a "sunlight readable" screen, all Garmin "touch screen" models are much harder to read in the sun compared to the eTrex or 60Csx type models (regretfully these models are also very complex to use). The main advantage of this Dakota unit is that it is better for paperless geocaching because it does display tips.