Must admit we're hooked on ours. I bought it as a present to myself with my last paycheck, and DH was of the opinion that it was a waste of money.

Guess who has withdrawal symptoms if he can't run with it now?

I find it particularly useful if I'm planning to run a certain distance but don't really know where I want to go - I can just go out and see where my feet take me. The trackback/go home feature is also very handy when running in strange places!