Summary: Had a GPS12 before this. I like the speed of this unit getting a position fix. Also like the added digits to name waypoints. The GPS12 showed a much better travelled track allowing me to retrace my trolling course.
Summary: Very intuitive & easy to figure out for a GPS. But then I'm an IT professional so that may be a bit biased. Wears nicely on the wrist, very lightweight and easy to read the major functions. Tracks are difficult but on such a small screen what do you expect? Would like it to be a bit more water proof for rafting adventures.
Pros: Fun, Intuitive, Lightweight, Stylish
Cons: Battery Life In Gps Mode, Slow To Aquire Satellites, Strap A Little Clunky
Summary: I used this (and the previous) on my Hobie Cat. it worked exactly as I wanted for the first two times used. It got wet, but was never submerged. the GPS does not come on. the light comes on when the power button is pressed, but the device never fully comes on. update 12/24/13: USPS mailed to Olathe Ks. (at my cost). Waiting on replacement. this is after I have had the device for 6 weeks.
Summary: I give the 72H five stars, despite some user interface issues, because it appears to be the ONLY hand-held GPS on the market that offers speed filtering. This is essential for sailboat racing, where we are looking for speed differences of only a few tenths of a knot as we cross tide lines, and course changes of only a degree or two as we find wind shifts. I generally set the speed filter to 30 seconds to smooth out all the scatter in the course and speed display.
Summary: If what you need is an accurate handheld GPS then this works great. However, if you need to depend on something to provide alarm notification, such as off-track or anchor drag, forget it. It's not that the unit doesn't detect these things; it does. It's just that its "alarm" is 3 very quiet 'beeps' and THAT'S IT.