Sched is easy to use and you can create the agenda for an event straight away. I embedded the agenda in my event website and sched automatically created also a one-page website. You can also use the Native Apps for iPhone and Android (paying an additional cost),
You can customize the colors but the overall structure is not editable. I was not able to customize the design of my agenda and the organization of it. Breakout sessions are presented all together at the same timing, you cannot decide the order and for some users this layout is a bit confusing.
You can manage only the agenda using sched (Sessions, speakers, exhibitors). If you need a tool to let your attendees interact during the event you will need to find a more complete tool.