The ability to send bulk messages via sms api using c# language which helps me in sending out promotional campaigns very quickly without any delay or hassle. I am able to track my campaign from dashboard as well where i get complete insights about who has opened it what time they have received etc. There are some limitations while integrating bandwith sms apis but its manageable once we understand them properly. Bulk message services available through this platform help us save lot more money than other platforms.