Reneroo, just to add an alternative (I too am looking at a Garmin watch in the future, as I am a big fan of their Sat Nav and GPSr units), but what app are you using on your iPhone?
I'm still using Runmeter, which I've had ever since I started "this" bout of leisure running, and it gives you loads of stats plus audible announcements at whatever interval you choose.
Just as an example, I have dozens of routes and activities set up in mine. This morning I ran a fairly easy 5K along a local route. Every 60 seconds I heard my total time running so far, my average pace, my total distance and my remaining distance.
You get loads of facts & figures at the end of your run, which can be emailed to you as a report if you wish.
Costs a lot less than a Garmin, and I have found it to be very accurate.
(I've also seen a lot of opinions on here and elsewhere that a mobile 'phone app cannot possibly be as good as a dedicated unit, but many of the people stating this opinion have absolutely no idea what these new applications are capable of.)
Edited: 15/09/2012 at 11:28