Visto WiFi Doorbell

Does anyone have any experience with this WiFi doorbell?

My interest in it is the fact that it has a lock relay in it so I can trigger my front gate if I want to let the visitor in. I currently have a hardline telephone entry call box in which the telephone component has gone out - all other features of the call box work but to repair the telephone portion I need to purchase another main board at almost $1000.00.

My goal is to have a call button with two way audio / one way video and the ability to trip the relay from a single screen.