As far as I know, it's giving good readings, albeit higher than the GlucoRx my GP gave me.
I have had to reset the time on about 5 occasions now, it's rather annoying when it does it when I am away from the PC I've got the software on.
The first couple of times I thought that I had held the on button too long, then I blamed the elastic strap holding it in the case for the same thing.
Now I'm convinced it's enemy action !