I am still in France, and did from the 19e of July until now 1150 km with the GB580P.
And what happend, my GB-580P was gone after 20 min of cycling, only the bad plastic mountingthing was still on, the todays mounting isn't made for bumpy ride in the forrest.
Yes, I did lost my computer 2 times now on bumpy roads, could luckcerly find it back.
The good tinks first:
1. The trackback is very good and the next page to change the Smart Track Points, is Ideal. Because you see if the track starts before your own position (the track came from internet en is devided in pieces) it is simple to press through untill the STP km goes from down to up again. Than you know you are now in the ahead situation and can follow the track, also the compas on that page is giving the direction.
2. The slope function is very nice, my cycle mades are jelous about it. They ask all the time give me the figures please.
3. Altitude is excelent, alt + is also very precice. I know this because in France at the top of the Cols (moutain) there is a altitude max and mine is always very close, more than the ohter drivers.
4. The amound on data you can put on the user pages is great. I use on all 4 pages 6 items. The speed, cadence and HR is on all of them, because I find this as most important.
5. The support from Globalsat, allready they bussy implementing our ideas.
Points for better device:
1. Better and different zoom function STP based, and maybe for a little bit speed based.
2. Better holder for the device, but it is there allready only could not try it jet.
3.Slope calculation over a schorter time, Recording to Geoffrey they working on it.
4. Changing the layout of handeling the user data pages. If you go into the user pages the up and down key should page through the user pages until you press OK. Starting the recording should be made automatic and saving the data could be done by ESC key. The OK works than like the GH625 and you go through the other pages in a cycle.
For the rest it is a excelent device and I am very happy with it, crossing with track back through France.