The triple sensors on the new casio g shock range spot on I've never had a issue with them other than the altitude mode which does need to be checked every now and then but to be fair it works on the the air pressure so driving and moving location can effect its reading but once your at a set location and you calibrate the altitude all the sensors are 99% although I will never trust an electronic compass 100% lol so I always attach a strap compass to use in conjunction with the electronic compass
The sensors on the earlier Casio PRW ranges were a bit hit and miss and I can't comment on the sensors on the pro trek models from recent years but like I say the current g shock triple sensor watches are very very good and accurate.
I like the fact that on the new pro trek 7000 model both the second hand and the info hand on the mini dial moves in conjunction with the second had on compass mood so they select north together, I can see why that has been done! having two hands showing the reading is more reassuring to me that the electronic compass is working correctly and the hands are moving freely, my only issue with the pro trek range is are they as tuff as the g shock range? I have to say the g shock watches really are tuff, my rangeman 9400 has survived so far! I'm not so sure the new pro trek range are tough enough for my use and abuse lol, the early models weren't so I stuck to using trusted analog watches and using them as a time compass (link below) I switched to sunto watches when they came out but broke a few so I didn't bother with feature watches at all and used the sun, moon and stars for navigation along with other survival techniques. When the new g shock triple sensor models came out I got one and they have remain undefeated! Do I really need a watch with all these gizmos? Not really and such gizmos distract you from using you skills and instincts.
When your out in the bush do you 'feel' a temperature change (therefore indicating a change in the air pressure hence a new high or low weather front is moving in) can you not? YES.
Do the sun, moon and stars not give you your position? YES.
Do you really need to know your altitude unless you in an aircraft fly on instruments only. NO.
Can you see and hear the natural signs of sun set and sun rise? YES.
Can you tell the time by measuring the distance of the sun to the horizon? YES.
Can you stand at the sea shore and watch the tide for 5 minutes and determine if the tide is coming in or out? YES
Do i still want the high teck outdoor watch? Hell yes cos it looks good and when I'm stuck indoors and the other half is watching eastenders I can any with it
but when it's broken I won't need it
Telling the time by your hand and the sun