I've been buying Casio Pathfinder watches for quite a while and this generation is the best so far. It has the two features I really prize: atomic timekeeping and solar power. It also has world time which is also a big plus, as well as a countdown timer and stopwatch - both of which I use. The thermometer function, like all watches I know of with this feature, is only accurate when the watch is not next to a heat source - like your wrist...

Pluses:
+ Better display - includes day AND date; the previuos model required switching between one or the other.
+ Declination adjustment - BIG improvement!
+ Smaller & lighter - BIG plus
+ Nicer design (my objective opinion)
+ Elegant band clasp design - virtually foolproof in keeping the clasp from accidently unsnapping.

Minuses:
- 10 degree compass accuracy - what?!
- no depth guage; not much of a big deal for me, but if the sensor is already there...?
- Barometer and altimiter are "close coupled" meaning whether the weather changes, or you're climbing/descending, both readings change. Suunto has a rather elegant fix for this in their new CORE line - you can set the Alti-Baro mode to "Alti" if you're climbing and only the altitude changes, or you can set it to "Baro" if you're in one place and only the barometric pressure changes. OR, you can set it to "Auto" and it then interprets rapid/large changes in pressure to be altitude changes and slow/small changes to be weather changes. It then switches modes to lock one or the other accordingly - really neat feature that works very well.

Finally, setting items in the various modes is still not quite intuitive, but getting better.
All in all, I'd recomend it.
RH