The customer service is second to none. While ideally you won't have a need to call them; they are quick, responsible, and friendly.

I like how easy it is to switch between phone numbers within the app whether it's dialing out for a call or sending a text to a client. I like that I can receive and send pictures in the texts. I also like that when a client calls me it rings my phone with my "tresta number" and tells me via a recording that it is a tresta call and to press 1 to accept.