You can register on the website as either a "host" or a "guest". You can specify whether you want to host any combination of "boys", "girls", "couples" and/or "families with children". You also specify whether or not you can provide lodging, which day of the week you prefer notification by and any other pertinent information.
This week we received our first meal request via See You On Shabbos and I am pleased to report that the system worked flawlessly! Our guests were lovely and engaging and we enjoyed their company immensely.
Why not try it out yourself. C'mon... as the website says - - - help someone "find their challah"!