I had the computer sitting around in the box for a few months before I finally put it on this week. Today was my first ride with it. Mine doesn't have an average speed but when I type my time and distance in BikeJournal.com I can get a good sense of what it was. But I do like knowing now about how fast I'm going on flats, etc. Now when I see group rides that post the average speed I know how fast that is. I get passed all the time and I'm on a hybrid or fitness/city bike. I'm just starting out so I figure I have to work my way up. In the meantime I'll guess work my legs out extra on the tougher bike. I was 16-17 mph on flats but definitely slower on the hills. According to BikeJournal.com I averaged a little under 12 mph but I don't know if that includes my stopping time. I do know though that I am faster than I was when I first started.