I bought one yesterday from Niketown along with some trainers to go with them. Thought I'd just make a post to answer the questions already posed and give some information I was told by their in-house Nike+ expert:
Hollywood said:
I know you can't have had it long but please tell us more! How accurate are you finding it? How many options are there? What's the power song feature like? How annoying are the voices in your head?
The accuracy is about 93% without calibration. If you do calibrate it, it can get up to 98% accuracy. Options include:
-setting distance, time or calorie burning goals and tracking your progress;
-workouts with goals or open ended workouts;
-progress tracking at nikeplus.com;
-compete against people with the same hardware/software, think this forum could make a quite big thing out of that in about a year's time or so;
-powersong, personally I think this is a bit of a redundant feature for me, but that's because the music on my iPod is already quite motivational, so I suppose it'd suit people who are listening to something mellow and a half like Jack Johnson or James Blunt and then when they're feeling unmotivated can push the powersong button and something like Survivor will come on;
-spoken feedback looks quite entertaining: you can set it to male voice/female voice or off. Even when its turned off, you can still get it manually by pushing the centre button.
I'm setting mine up as we speak and its going for a trial 10km tonight! I'm going to the gym to calibrate it on the treadmill, I figure that's probably the best way of already having an accurate distance.
Their Nike+ guru said about the types of shoes they were selling: At the moment the only running trainers out Nike+ enabled are for neutral runners, the next batch of shoes are coming out in September which will be suitable for specialist runners. Make what you will out of that, whether specialist shoes would be for overpronators etc or for marathon runners. He also said that in about a year, practically all of Nike's trainers will be Nike+ enabled, so it'll be as common as something like Nike Air.
Personally I'm very glad that Nike have released this product, it appears fantastic and I can't wait to use it. I'll give you another lowdown on how it fairs post-calibration and 10k! Nike will certainly do well out of this, as they've found a niché in the market and now that they've got a deal with Apple, they've just created a monopoly out of it so that no other company can really enter the market for the same type of software.