Overall: Good piece of kit when it works. The first unit I bought stopped working after 6 weeks - after being sent away for 3 weeks for repair it was replaced by a new unit which has stopped working withing 5 weeks. Not what you expect from a £200+ watch.
Strengths: Very accurate Easy to use Cheap Talk back feature Nike + website easy to use and great for looking at runs An excellent buy
Weaknesses: The running gear that comes with it is expensive (£50 for a top) Would be nice to have an indication after every mile rather than having to press the button
Overall: EXCELLENT great buy and genius design. The accueacy surprised me - over 16 miles it read the same and a £200+ GPS watch. If you ahve a nano its well worth the money. Don't bother with the Nike shoes - Ive just put the sensor in a key holder laced into my shoes and it works great. Only downside is the cost of the gear that goes with it - you'd have to buy a holder for it as the apply one doesn't support the addition and thats more expensive than the Nike+! If you have a nano go buy one :))))