GCzII is now Approved! in GPS technology and devices Posted June 24, 2010 I take exception to that statement -- what tasks? Yes, it has the advantage of using a live data connection. [...] Since it can't do live data updates (no cellular radio), I have to preload my Colorado [...] But, I'm also not the target market for Trimble. I'm not sure how you can "take exception", then ask "what tasks", then go on to list its claim-to-fame capability as being something you can't inherently do on the Colorado. You've taken exception then answered your own question, proving the truth-table behind my statement. You then go on to note that you're not the target market for the Trimble product because it's not rugged enough, in that it runs on your cell phone, but do so as a defense of GCzII (which, incidentally, I happen to like a lot) that is... Running on your cell phone, which, unless GCzII comes with a water-proof, shock resistant case that I didn't receive when I downloaded it, hasn't adequately effected the ruggedness of the cellphone. Frankly, I don't find the Colorado rugged enough for my backwoods caching either. Fine in the same environs I'd use my cell phone in, but the 60Cx (and soon the 62C) are more to my preference. I'd trust the Colorado more than my WinMo smartphone in the rain, but not repelling off of cliffs and traversing fast-flowing waters. And when it comes to actually extracting myself from those environs - I wouldn't trust _anything_ that had a battery or MCU anyway. That's what the Cammenga Tritium (and the backup Silva) is for.