I'm on my fourth black/orange Core. They have all gone and done weird things. I purchased it at REI, so thankfully I've had good customer service...but I'm starting to wonder if it just isn't meant to be for me. I've had Advizor's, Vector's, an Observer...all with no troubles. But with the Cores it's been quick dying batteries (multiple batteries per unit) and random re-sets on each one I've had. Have I just had poor luck? I use the daily alarm about 5-6 days per week and I use a few logbooks per week, but I don't have any button tones or storm alarm activated. My fourth Core just died again this morning and I'm going to take it back...question is, do I get another one or just call it quits.