Want to be able to download an ultra route
I have used my 305 on a couple of off road ultras, works pretty well as long as you follow the instructions and use it as a confirmation tool!
Although at one stage the path had become overgrown and I took a slight detour and then could not tell which way I should be running on the line, a couple of good circles and I found the path again!
But overall I will use it again as it is light and I would wear it anyhow.