Great for the price. Not entirely great for my purposes.
Nicole L. Summy, Amazon
28 January 2015
Summary: Pros: round shape makes it move through water really smoothly...hardly know it's there. works good for counting laps in the pool. so far, seems totally waterproof. really nice for keeping track of mileage while hiking. Cons: can't maintain GPS connection indoors (can't use GPS to keep track of swimming distance in indoor pool). some reviewers say it's not ok to swim in it. some say it is. I'm taking the risk (and so far, so good). it's REALLY big.
Summary: Apparently "water resistant up to 30m (or 35, can't remember which) means not water resistant at all. The first time I wore it in the water swimming laps it filled with water and was ruined no matter how long I dried it in rice (for months) Great watch if it never gets wet though, just wish I had known that.
Summary: The watch works. I use it for running and the overall pace it gives is accurate. I have tested against the GPS on my phone and by running on a track. The biggest drawback is that when you change your running pace, the watch will take about a minute to reflect your new pace. I think it just takes your average pace over a minute or so, so if you want run long distances and add in a few intervals, you may not be able to immediately see when you speed up.
GPS is picked up almost instantly with the Garmin and the numbers are large and clear enough to be easily read.
Keith J. Karnok, Amazon
9 November 2014
Summary: If a person had no experience or comparison with other sport watches (GPS, stopwatch, etc), maybe this watch would be okay. But I doubt it. I have a Garmin that cost about $20 more and it is light years ahead of this watch. The primary problem is it won't pick up a GPS signal. When it does, it may have taken 20 or 30 minutes. You can't wait around to start your walk/run for the GPS signal to finally be picked up.
Summary: The Timex Marathon GPS Watch is a great addition to my running gear. This is the first GPS watch I have owned and it proves that good information changes performance for the better. In the Set mode, the watch has a time/date function that lets the user key in information by time zone. I use the Washington D.C. Daylight Savings zone. In Set, I selected Auto GPS so the watch uses satellite information from the GMT source for accurate time and date display.