In reply to Capt. Spacey:
i had a foretrek 101 for a number of years so i could write notes and have my location settings visible without juggling GPS, field notes, pens, field map, sample bags, hammers and all the other junk i carry around.
works great, occasionally messed me around where there was limited signal (being on your wrist is not really a good place for a GPS - but it only matters when the sky coverage isn't great to start with.
for climbing / walking - its not a big change. its only a grid read out (plus maybe time and elevation (iffy - as will all consumer GPS). IMO there is no benefit over a normal handheld unit other than weight and size.
the strap gave out in the end and the unit is now somewhere in NE Canada being used by bears.
HTH