I am very pleased with this watch.  Very legible easy to read.  Packed with features. It is a dual sensor. It doesn't have the barometer. The barometer would be nice but ok.  Timekeeping in the time that I have had the watch is excellent so far and I don't expect that to change.  Very nice looking watch. The red band is a nice shade not to bright or dull looking.  This is a large watch. Very large.
  Getting the hang of a G Shock or any Casio watch for that matter isn't too hard to get the hang of. It seems a bit overwhelming at first but the settings are not insurmountable as it may seem.  There are very good YouTube videos to help you along.  The manual is great compared to the manuals other watch makers provide and the manuals for Casio watches can be downloaded as a PDF if you want to have the manual with you at all times.
  If you are looking for a great outdoor watch or want a weekend beater that is a cut above this is a great buy.
  Ok one thing I have found that I don't like is the light control.  Unlike most Casio watches the light on this one is controlled by the upper right button.  Being left handed this is a tiny bit awkward.  A minor thing but this has been the real problem.  Turning the auto light off has been a real bear.  It doesn't seem to turn off as it should.  There is a six hour turn off if the light isn't activated.  The thing is I am now reluctant to use auto light on this particular watch.  Wish it had the more typical center button that most Casio watches have and is after all kind of a branding kind of association people have with Casio watches anyway.  At the end of the day I would have still bought the watch I think. As far as a negative this is the only one and a minor one. If you are left handed it may be a consideration.