Kangaroo. It’s similar to Simpli Safe, but far more affordable. Set up was intuitive and fairly quick (30 minutes-ish). The motion detector is great and can be positioned to ignore pet activity, but it’s smart enough to recognize human movement. The motion activated door camera has a built-in night vision feature. Magnetic window sensors will let you know if someone is trying to sneak in (or out). The system is easy to arm/ disarm- you use a key-fob (or a traditional code, you decide).
Overall, my experience has been great. A cheaper alternative to more popular providers, but you don’t lose quality. I recommend it.