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Looking at this, would recommend almost any of the other low end handheld gps units such as the etrex previously mentioned.
While the Bushnell size is nice, the specs indicate only three "waypoints" which is very limited. It also looks like the information is limited to "direct line" from where you are to the point you want to return to.
All of the handhelds I have seen allow backtrack either by "breadcrumbs" but they also give a direct line heading and distance back as well which works in the parking lot.
"breadcrumbs" is valuable for things such as backtracking a trail where direct line might direct you across a canyon or lead you into a blind alley in the city.
Garmin also has a line of small, relatively inexpensive gps known as "Geko" which are primarily "backtrack" gps units without maps.
I've had a Magellan Explorist 500 (now discontinued) for several years and it has been a fantastic tool (after going through the steep learning curve...) was a costco special for under $200 including usa detail maps, small, rugged, weatherproof, long battery life with a huge number of capabilities plus it uses SD card storage which is a major consideration. Garmin has a number of units with similar in capabilities but much more expensive for comparable units, plus there are other handheld mfg's as well.
Back to the ppc apps... would assume that most allow you to "mark" your current position as a "poi" ...once you have done that, you can later select that poi and ask the app to give you directions to that point... it may want you to walk down an interstate, but, the display should give enough information to get you back.
Hope this is of value to someone,
Beverly Howard [MS MVP-Mobile Devices]
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