I’ve used the Bushnell Backtrack for around 4 months now and it is still working great. I still have not needed to replace the batteries but since the weather has turned cold I haven’t been using as much lately either. I did find it interesting that my calculations for the slope on some of the local climbs I do on my recumbent turned out to be very close to what a friends very expensive Garmin 705 gave him. I told him before hand that a climb was 19% and sure enough it was. But of course I also relied on the altitude readings from my watch as part of the calculation so the Backtrack had a little help.