I recently bought the 305. I have since returned it because I found it to be bulky and too big for my wrist (I'm a short 5' lady). My DH refused to use it and said it bothered him because it was too big for him as well. We're now looking into the 405. My question, though, is that the 305 didn't give us an average pace but what the pace was at the exact moment. I'm assuming we just need to set it different to do the average (honestly didn't mess with it much and only ran once using it to see what we thought). Am I correct in this assumption? Will the 405 do the average pace so that when I'm done, it'll calculate what my average for the run was? I absolutely love having the time and distance we've done on the screen and if it'll give me an average pace, then I'm all set to get it. Thanks for any input.