I have a friend looking at going with Vivint Security.
They claim they will use the existing sensors from the ADT (Ademco rebranded) system but I could swear Vivint can only use their own sensors.
She's worried about integrating her Wink water sensors and (sic) Alexa with the new alarm panel and Vivint said they can integrate with Wink and Alexa.

Anyway, any input you would care to share I'd appreciate it.

Thanks!