Comments about Suunto D4 Wrist Computer:

This is a great secondary or primary computer. My primary went down and I needed another computer quick, most of my friends use a D4 or D4i so I grabbed one too. It was a little different using a wrist mount opposed to my usual gauge mount but the functions are great and it is really easy to use. The safety features are great. It provides all the information I need and then some. Gas switching is one of the most useful features I have found with this computer.

Comments about Suunto D4 Wrist Computer:

Great Dive comp, it's easy to use, compact and great for dive travel.
Compact and stylish to be use as a watch.

Comments about Suunto D4 Wrist Computer:

All Suunto dive computers with dot matrix dive profile displays do not make average depth information available in the logbook. I found this out after I bought it because I assumed (wrongly) that the D4 would have, at least, all the features of the "lowly" Zoop available. Since I calculate my surface air consumption (SAC) rate after each dive, average depth is a critical part of my diving; and so I now just use the D4 as a wrist watch (it does look good) and dive with my cheaper Zoop, which does give average depth in the logbook.

Comments about Suunto D4 Wrist Computer:

I bought the D4 as a replacement for my Mosquito. The D4 is a bit easier to use than the Mosquito. The Mosquito has 4 headings in the Mode menu: Time, Air, Set, Mem, while the D4 has Time, Dive, Mem. The submenus are the same for both watches, but I prefer the Set as a submenu of Time.

The D4 is somewhat larger and the numbers are also bigger. Both are readable but I much prefer the smaller numbers of the Mosquito because of the contrast between the numbers and the background. The image on the Leisure Pro site is an accurate reflection of how the display looks so judge for yourself. Just on the basis of this, I would not recommend the D4.

The battery of the D4 needs to be replaced by a technician. This may not be a hassle, but I really enjoyed being able to replace the battery in the Mosquito.

In my tests, the D4 and Mosquito use identical algorithms for diving on air. I have not tested the Nitrox setting.

I highly recommend the Digital Online class that is offered with the D4. This class is a very nice way to get acquainted with the D4.

Comments about Suunto D4 Wrist Computer:

Upgraded from a Suunto Mosquito and used for a week in the Caymans. Worked flawlessly, easier to use and read than the Mosquito. Also wore as a watch for the week.