Join Date: Nov 2003
Sportbike: 01 F4i (Well, I HAD one, anyway)
Years Riding: 7
How you found us: I google myself regularly
Since 2010 I've been using the Adidas miCoach, which includes HR monitoring. It's not GPS-based, but the shoe pacer is pretty darn accurate. I particularly like it because I don't want to carry a phone when I run. You can run it in conjunction with an mp3 player, too, so what I love is that I clip the tiny miCoach and the tiny iPod shuffle to my shorts and go.
GPS watches don't work all too well by me, as I run under a lot of tree coverage. miCoach works indoors, and will also track a variety of other activities (lifting, etc.) but I haven't much used it for those. Purely for running, I love it.
You create a program in advance, and then you turn it on and go. It stores 20 or so workouts; when you turn it on, there is voice guidance telling you when to adjust your speed, how fast you are running, and how much time you have left. And you can turn off the voice coaching if you don't want it.
I will admit it's not the most technologically advanced device out there, but for $100 or less, it's pretty good. I have no desire to upgrade.
If you get a GPS device, make sure it has a good return policy; lots of users complain coverage in their workout areas isn't the greatest, while others say it's perfect. You just never know.