I had smart start installed on both the rams I drive (2011 3500, 2014 1500) Its awesome @ $300 per truck. Here is why I got the smart start and pay yearly for the service.
1. It tracks the trucks via GPS so I know when they're moved, a Geofence can be set up when they leave and enter the driveway. Great peace of mind if your in a high crime area.
2. Notifications can be set up for the geofence and or speed limit infractions email and text. (I haven't used the speeding nanny)
3. I can lock, unlock, panic, Start/Stop, as well as see the state of those things via the phone app anywhere in the country. (If its locked, running, doors open, hood open I can see those things via the app.)
4. I have schedules set-up so I can start my truck automatically based on environmental factors.
5. I can find my truck anywhere I park it. EXTREMELY helpful during concerts or large events.
Not everyone needs those things. But I travel for long periods of time so I start both the trucks at least once a week when I'm out of town. Also since I'm in the Midwest the winters are brutal. In the winter I put the truck I'm gonna be driving that week on a schedule to start at a time I see fit (30 Min before my departure time) and when the temp outside is too low for me (40F.) This allows me to step into an already warmed up truck. I do this everytime I'm working, staying in a hotel and it's freezing outside especially for the diesel.
Just my two cents. I definitely recommend for the Northern folk and the travelers. There nothing like starting your truck from your hotel room and know it'll be warm when you get there.