the only real trade-off is adjusting the time every week or so… but i rarely wear it for more than a few days at a time anyway.
surprisingly, it keeps time quite well (only drifting about 15...20 seconds a month), and it's both waterproof and shock-resistant. can handle running, jumping, swimming and whatever else i usually do
...oh, and at some point i have to service it to keep it running smoothly and waterproof. haven't done it once in years.