Our review partner Digital Trends tested the GlobalSat GPS Data Logger DG-100 and published a review.

Quote from the review: "Now that GPS and satellite networks are so common and inexpensive to utilize on a consumer level, GPS tracking (a.k.a. geotracking or geocaching) has become a mainstream hobby for millions of geeks and traveling photographers worldwide. There are countless commercial applications for GPS data logging, from tracking truck drivers and cargo to mapping highly accurate traffic patterns, locations of accidents, and more. GlobalSat maintains a vast satellite network to communicate with its GPS tracking devices like the Data Logger DG-100, a $90 USD gadget. We studied the DG-100 and took it on the road (and in the air) to get a good feel for how it performs. "
Read the full GlobalSat GPS Data Logger DG-100 Review.