I've been using&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Timex-Men-s-T5E231-Ironman-100-Lap-Watch/dp/B00093CZV0/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Timex Men's T5E231 Ironman 100-Lap Watch</a>&nbsp;since 1995ish.  No, not one watch, probably about 4~5 of them over that span.  All Timex Ironman watches that I've used have one huge flaw: when you replace the battery, the watch looses the ability to beep and alarm.  This is true even when you have it replaced by a Timex certified watch repair (or at least a store that was flaunting a sign with it's ability to repair Timex watches).

They also don't keep time well.  They drift by a few seconds every day.  This is fine for most uses, but it does get a little annoying if you really do want to time particular events every day down to the second.

Fortunately, the Ironman watches are cheap enough that I don't mind buying a new one every three years or so when the battery runs out.

This specific watch has a few features that I thought might make it a tad more useful than my usual purchase.  Here's a comparison of those two watches from my experience:

Pro:
. both are waterproof; used 'em diving down to 30m without issue.
. both have similar controls, but this one lets you customize the UI/display a bit by removing features you don't want to see (like the golf score tracking)
. this version's buttons are recessed more and harder to select accidentally (by contrast, the T5E231 main start button is hit VERY often by accident -- so often I have to match the alternate timezones because the main start will swap between them without my noticing it)
. the band has an extremely solid locking method; unless the band actually breaks, this watch won't slip sizes or even slip out of the loop that keeps the excess band from springing outward.
Con:
. the display on this watch is smaller; it's not a lot smaller, but the difference feels profound -- enough so that I'll buy another T5E231 instead next time.
. this version has fewer alarm times (3 instead of 5).  I'd rather have more alarms than the ability to track my golf score.
. the band is a bit annoying to put on compared to the T5E231's -- part of the price of it being so secure and understandable with this being the "shock" version.
. the band is also a tad small, which can be an issue when wearing a thick wetsuit.

This is essentially just another flavor of the Timex Ironman watch series.  All of that series that I've used have performed quite well.  I do have one bogglement: Golf score?  On the high-shock watch!?  I'm now afraid to play golf with Timex watch designers.