What's not to like- well the little adapter you need to inflate an air mattress/sleep pad is easy to lose and not an easy size to replace.
What's to like- a very light and easy to use/carry pump for your "self inflating" sleep pad. Also serves as a decent pillow with no extra weight penalty since it is the same weight as the pump it replaces.
Notes- I have found that the pump works best if you cover the breather hole with your hand on the down stroke. Also, you can't use this pump to deflate only to inflate.

As expected it fits perfectly.

The alarm is not nearly loud enough. You can only hear it in a very quiet room and definitely only if you are already awake.

The good. Good instruction manual and easy logical to use considering all the features there are. The compass is very good. The watch keeps excellent time. The battery is very easy to change and a standard size you are likely to find on vacation. The display is the easiest to read of any I have tried. I got the black-they originally sent me xblack by mistake and it was impossible to read that display so if easy reading is important don't get xblack.

The bad. The barometer is only accurate to .05inHg. While it is accurate within that range, this seems to allow for too much variation in the altimeter reading. Also, I think their correction factors are not totally refined. I can go to sleep at night and due to a change in barometer the watch will claim my altitude changed by as much as 80 feet while I slept (since I live at 400 feet this seems like a huge error). I realize that this type of altimeter is not totally accurate as the weather changes, but this watch is not much better than my previous G-shock Casio that was much cheaper. This watch is much sleeker, better looking, and has a better user interface than the Casio and is a much better watch overall, I was just hoping that the altimeter would be much more accurate.