It just seems so cool! Unlike other GPSs which use feeds of a few trouble spots to take traffic into account, the Dash Express uses other Dash devices as a swarm network to build historical records and get real-time data on local traffic. It then offers you multiple routing options, every single trip, with predicted times. You have to pay $10/month for the 2-way connectivity, but for that you also get constant free updates of maps, and the ability to send addresses to the GPS from your browser.

And they've released an app system which already has some awesome-sounding apps: warnings of speed traps and access to Gcal. Other cool features include searching for POIs along your route (ie "I want to stop at an ATM, I don't care where, but I want to minimally deviate from my trip"), prices for gas stations,

Apparently it is also bulky and a little buggy, but still sounds well worth it.

I sure wish I had those features in my crappy BMW in-dash GPS system, which cost way more.