Home security opinions solicited

[carbonel]

I have a home security system that I've been paying $60/month for quite a while. At this point it's old and creaky, and I need to decide whether to upgrade it (which means tying myself into a new five-year contract) or dropping it entirely. The alarm company wants to keep me as a customer, so it's offering me a new system with free installation at the price I'm currently paying, and sweetening it with a $10/month discount for the first year. The new system comes with a doorbell camera and alarm -- though I have a front and side door, so I'm not sure which is most appropriate.

Do people have general opinions on home security? I've mostly kept this system because it was part of the house when I bought it (plus inertia), but it is an ongoing expense. I live in a low-crime area, at least for now.