Overall: I am an over pronator and wear orthotics in my walking shoes - but, after a knee injury that laid me up for 4 months, I decided to try the Frees.
It took a while to build back up (generally), but since I started back (nearly a year ago now) I haven't run in anything but my Frees on the road, and have raced in them up to half marathon distance.
My first pair (the 'original' black and white ones) I wore for about 600 miles, and then I felt that they were starting to wear out - the soles were losing some of their tread, and the upper fabric looking a bit tatty. However, the heel pocket never tore.
I have 2 more pairs now - one 'normal', one off road - and I still love them, and still no heel tearing issues.
The only thing is (but I think this is a plus) you just can't plod in them - and by that I mean that you always have to be thinking about landing gently, otherwise it hurts!!
Strengths: Excellent software Instantaneous pace Accurate No loss of signal anywhere, ever Robust Polar wearlink HR strap is excellent Add Ons for bikes are brilliant
Weaknesses: Watch is a bit large - but not too hideous 'Beep' could do with being a bit louder - or even better, a vibrating alarm option could be offered Can suffer from some speed interference if running with others wearing the footpod
Overall: This is my best bit of kit ever, and despite paying top whack for it I have never regretted my choice.
I do a lot of running under trees which is why I originally chose this over the GPS systems, but having seen the performance of this compared with some of the GPS offerings, I'll stick with my accelerometer thanks!
It has totally revolutionised my training - the software lets me measure my programme, the watch lets me monitor how fast/hard/far - what more could you want?