Does anyone have a Nike SDM that still works? If so, how long have you had it for? I've had two since January last year, both of which lasted less than two months. I have just got around to phoning Sweatshop re my latest one, and they said it was only the first batch that was faulty. If so, that would be great news because I much, much prefer the Nike to the Timex, but I am still very sceptical. Anyone actually using these?