To achieve the best data you may need to purchase the optional heart rate monitor and bike sensor. These options work wirelessly for maximum convenience and ease of use that is, considering they are separate accessories. Some other manufacturers incorporate the heart rate monitor with the watch unit which we find to be a better option.

Satellite signal acquisition is reasonably quick thanks to the SiRFstarIII tm technology. All GPS watches or other receivers will occasionally lose signals depending on the area’s obstructions. That said tree cover and use within large cities with taller buildings continues to improve as time goes by and technology improves.

As you might expect, the unit measures speed, pace, distance, altitude, timer and rate data. The screen is set up to display 4 data fields in a quadrant layout which works well and is fairly easy to read and monitor.

The days of getting lost should be over thanks to the ability to store 100 waypoints and upo to 50 routes. These features can be most useful for those who do a lot of traveling and run or bike in unfamiliar cites or countries. If your work out takes you to the beach or pool the watch is good to a depth of 50 meters.

Once your work out is complete you can download the data to your PC and utilize the online tools to dissect your strengths and weaknesses. This is where GPS watches can really add some benefit to your training regimen. Also the lithium battery can be recharged while plugged into your computer so it will be ready the next time you need it.

All and all this is a solid performer with our only criticism being that Timex offers the heart rate monitor optionally and not built into the watch itself.

Notable Features; 

Unit Size – Comparable to conventiona l watch 

GPS receiver – Separate from watch.

Battery Life – up to 2 years/watch 

Battery Type – 1AA for GPS unit 

Water resistant – Yes to  50meters for the watch, gps unit splash resistent 

Heart rate monitor – Yes 

Lap memory – Yes, 100 laps 

Waypoint memory – Yes, 10 

Routes feature – Yes, 50 max 

Warranty – One year 

Timex approaches the GPS Tracking Watch concept by separating the GPS unit from the wristwatch. There seems to be pros and cons for the split unit approach and the decision will likely be a personal one. One obvious advantage is the watch size is kept small enough to be an everyday watch. When the GPS is needed it is strap mounted to the arm or waist. The watch itself is water resistant to a depth of 50 meters while the GPS unit is only splash resistant. For an electronic device used outdoors in various forms of athletics this seems a poor choice to us, better water resistance would be preferable. 

Battery life for the watch itself is a strong point and should last up to 2 years. The GPS tracking watches which integrate the watch/GPS in one unit need frequent charging and have shorter operational intervals. The GPS unit operates on a AA battery which will require periodic replacement and are small enough that one could carry a spare while out for a run or hike. There is no charger provided for recharging the GPS units batteries but one could purchase an aftermarket charger for recharging the AA battteries.

In operation the unit performed well with no issues. Obtaining satellites took a minute or two and accuracy was very good. We found the accuracy to be better when strap mounted to the upper arm rather than at the waist. The upper arm location likely enjoys a better view of the sky and satellites and so one might expect better performance when used that way. The GPS signal did not suffer much when running through moderate tree cover as might be typical in a park like setting. 

The heart rate monitor performed well providing a steady read out and target feature would prove valuable for one looking to get top conditioning in a minimal amount of time. 

We think the Timex performs well and would be satisfying to most people based on performance and price. When selecting GPS tracking watches take the time to consider whether you want an integrated unit or separate GPS/watch components as described here.