There's tons of cool features:

• Watch Live TV and browse your your entire TV guide and channel lineup
• Browse and access our On Demand library directly from the app
• With the TV to GO feature, watch programs from top networks anytime, anywhere
• Use the picture in picture video player to watch content while browsing other sections of the Optimum TV app or multitasking on your device

Somehow reviews suck. It's only 1.6 stars. I think I'd avoid this.