I have a 60CSX, which is pretty much the same. I've had it for a number of years. The S stands for Sensors, so I think mine has a pressure sensor (altimeter) and a compass which maybe the 60CX lacks. Not 100% sure on that.
It's a super GPS, in my experience
I'd echo what people have said above.
Pros
* Bomb proof build quality NB - I've never had the "cutout" problem described above, perhaps I've just been lucky or others unlucky. Mine has been subjected to much abuse, dropped, soaked, been left out overnight at below -30C and has never complained.
* Long battery life. And it uses AAs so you can use rechargeables, and pick up replacements in an emergency pretty much anywhere.
* It's really good. Sorry if that's a bit wooly but it does everything I want very well.
Cons:
* I have knocked it out of the handlebar mount a couple of times, once with my knee while climbing and once going down a steep bumpy track. However I always loop the lanyard over the bars so no prob there.
* It's not terribly modern - I'm not up to speed with all the whizzy latest things but I bet there are ones out there snazzier connectivity and software, I don't know. And to be honest, I don't care because I like my 60CSX so much.
* The Garmin map CDs/SD cards are expensive. Check out the cost of maps (I haven't looked for a while so maybe the cost has come down). HOWEVER you can get the OSM maps for free (from Talkytoaster). These are what I use and they're fine for cycling. However installing them is a bit of a techy headache, but there is plenty of help out there on the net. If you want maps from abroad there may (or may not) be OSM maps available - for example I managed to find OSM maps for Finland, but the quality of OSM maps varies country-by-country.
NB: regarding the difference between this and the CSX, The lack of a barometric altimiter shouldn't be a big deal. It'll still plot your ride profile and give you things like total metres ascended using GPS altitude. The lack of a compass again isn't a big deal if you're cycling. The GPS compass will work OK if you're in motion - it just won't work if you are stationary.
There may well be better units out there, I don't know the market at all so I have nothing to compare it with, but I am 100% happy with mine.