I'll second this and add "Read the manual
again after you've been diving it for a while"
I have a Suunto Mosquito and am very satisfied with it. (I've taken it in for a "check up" because the
depth sensor seems to be slightly flaky, but still like it.) When I re-read the manual after seeing a thread here about what the "attention symbol" meant at the start of the dive, I discovered that there's a simple way to select which items are shown by default in the EAN mode during a dive (fO2/maxdepth/temp and ppO2/divetime/clock). The default defaults are fO2 and divetime, but I always wanted to see temp and divetime. Now I can! (well, when I get it back...)
A few months ago I found a thread which linked to a study of several different dive computers and evaluated them on their "conservativeness". They ran each through a dive in pressure vessel and then compared the settings on some PC-based deco program that would result in the "best fit" to the actual results from the computer under test. The Suunto model was somewhat "more conservative" than most, but that actually suits me just fine (I already owned it before seeing the study). I even have my personal adjustment at "P1" for a bit of extra safety.
-Rob