I have a Suunto D3 freediving watch that I use as a backup gauge to my Oceanic Data Plus. I've had problems with both.
Oceanic had a product notice regarding cracks around the base of the capsule. When I inspected my computer, sure enough, there were cracks around the base, so I retured it to the local dealer that I purchased it from and they sent it back to Oceanic. I received a remanufactured replacement unit that has worked fine since. (I would have like to have a received a new unit but that is how they handled it) I was told that the warranty on the replacement unit would continue out to the end of my original computers factory warranty date.
The Suunto D3 is a little diffenent. It worked fine for a couple years of mostly pool use, combined with some vacation diving as a backup gauge. I would frequenly use the stop watch feature to time my lunches at work so I wouldn't be late getting back. Intermittently, when the stop watch timer is stopped and cleared, the watch will completely reset, losing dates, time, dive records and such. I initally thought that the battery was almost out, so I replaced the battery a couple times. It still had the same problem. I have not tried to get it repaired.
It was well past the warranty period. I purchased it from LP for A LOT less that my local dive shop was selling it for. I originally visited my local shop for the purchase, but they only had the orange model and wanted to clear that out rather than ordering in a blue one. So I left, went home and ordered it online. I don't feel any obligation to buy locally when I get this kind of customer service. It still works as a dive depth gauge, timer and such. I just don't use the stop watch feature anymore.