Purchased the band upon initial release, and like many was excited. As with other Microsoft products, you would expect something of good quality and neat technical features. Initially, I was not overly disappointed. Although the band itself felt a little cheap (given the hefty day 1 UK price tag), the features were what you would expect from such a device and setting up and using was also a relatively painless product.Further testing revealed the GPS can be a little sketchy at times, as is the case with the pedometer which can overestimate both steps and distances by some way when pushed further (the irony being that measuring the same activity via both the pedometer and accurate GPS would give you two fairly different results).After a few months use, the battery charging point seemed to become a little more intermittent, despite following all the correct care procedures within the documentation accompanying the device. However, after less than 6 months, while out on a bike ride, the device snapped. Further investigation shows the band had clearly worn away at the join between the clasp and the band itself.Not an issue I thought, I would just send it in for warranty repair. And then the fun began. Despite acknowledging the fact the band had failed and the device had ended up planted on the road as a result (remember, this is a band sold for activities such as running, cycling etc), after a wait of over 2 weeks I received my device back in the same state, with a note telling me due to the damage the warranty was now void, and the device would not be repaired.Rather comically, the note failed to even register the fact that the device was damaged as a result of the strap breaking. After contacting support, I was told my case would be reviewed. I then received another response telling me due to the damage my warranty was void. Again, a complete failure to grasp the concept that the device WAS damaged, because it fell to the ground when the device snapped.Still not happy with the response, I attempted to appeal again, only to be replied by the same person, who now made reference to a battery being detached (which is not and never has been the case), and upon further review the decision still remained. The long (and short of it) is the device has failed during normal daily use. Perhaps the device itself was one of a bad batch, a fault in the material or some other reason, but the point blank refusal by Microsoft to even acknowledge the damage is caused by the device falling to the floor, and the whole chicken/egg scenario of this, has left me with a device rendered useless, with the warranty voided after less than 6 months normal use, and a long battle on my hand.Having used other products in the past, and knowing of other people who have received excellent support from other companies such as Fitbit with similar products, I would suggest avoiding this product altogether if you want to use it to track activity. If you want something to check messages, e-mails etc, buy a smart watch, if you want something to track activity, buy a Garmin, Pebble, Fitbit, Jawbone or one of the other devices.