Forerunner 305

I just purchased the Forerunner 305. I'll be reviewing it's pro's and con's. I already LOVE it when compared to my Nike+, but I'm currently still using both. It's just more accurate, so far. I did find an issue this morning on a walk from South Station to my office that it 'JUMPED' a block away and came back... Weird... My walking pace was almost at 6 min mile. I know that's wrong. I'm sure there is a way to currect an inconsistency like that, but I need to try and find it. Wish me luck and give me any inputs!