The ONE vs the GO 720
I've just upgraded from a ONE to a GO 720...
While I like the ONE and it has a new home with my parents who expressed an interest in getting a simple GPS nav unit, I decided to upgrade to the 720 - there were two features that really grabbed me and convinced me to update.
1) While the ONE can use Plus through *some* Bluetooth phones to get traffic info, I'd much rather use the RDS-TMC receiver. I didn't want to change my cell provider or go with Plus for this (more expensive in the long run). I should note in fairness that apparently the One XL can also use the new traffic receiver, but the ONE itself cannot.
2) I wanted to be able to use the 720 as a hands-free kit with my cellphone. It took some doing, as my cell phone is a sprint phone that is not specified as compatable, but I was able to make this work fine (I've posted another thread regarding using the Samsung SPH-M300 sprint phone if anyone needs that).
Also, I'm intrigued by the mapshare system the 720 has access to, though it wasn't really a strong reason for me to get it. So far, though, the 720 has impressed me.
The ONE is still a good solid nav unit, but there's a lot of nice addons to the 720 - unless you're really on a tight budget, spring for the 720.