Nike + iPod is Only for Dedicated Workouts
The sensor has a limited battery life and should only be worn in the shoe when you are going to track your workout. That means removing it from the shoes if you are wearing them when not going for a walk or run. You can turn the sensor on and off by using a point to poke the switch on the bottom of the sensor.This is annoying if you plan to wear your shoes other than for dedicated walks and runs. Personally, I'm buying a pair of Nike Air Zoom Moires to wear at work because they are so comfortable. But I guess I'll have to put the sensor in when I'm ready to go for a "real walk."
I wondered at first what I would do with the receiver unit when I wasn't using it, as well as the sensor if I took it out of the shoe to save battery life. I decided that the Nike+ armband makes a good storage unit for these small parts.
Doesn't Give Step Totals

Speed and Distance Accuracy
The distance and speed will only be as accurate as your calibration for your walking and running strides. It is great to get a speed readout, but it pays to calibrate the unit so you can trust it a bit more. It should be more accurate when used with the Nike+ ready shoes rather than just taped under the laces such as I did in a pinch. The plus is that the speedometer function works indoors or outdoors, while the most-accurate GPS units (such as the Garmin Forerunner or Timex Speed + Distance) work only outdoors, and even then don't work in canyons, forests, or when surrounded by tall buildings.Easy to Use
I bought the full system - iPod nano, sport kit, armband, and the Nike+ ready shoes (yet to arrive). I found the iPod nano to be super easy to set up and use. The sensor and receiver were also no-brainers. There was practically no setup at all other than installing and updating the software for the iPod nano and iTunes. I use my own headphones rather than the earbuds provided. The only drawback I found on first use was that it was hard to adjust the volume when the iPod nano is in the armband.I'm an audiobook listener rather than a music listener, so I was a stranger to playlist and ripping songs from my CDs. This was extremely easy to do with iTunes, as you probably know well. You can also download workouts from iTunes, including playlists by athletes such as Lance Armstrong. You and Lance can train together for the marathon.
Nike+ Lifestyle

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