Olark is extremely easy to use. It boots you off automatically if you forget to log out and don't respond to a chat within a few minutes. It pop's on your screen when anyone chats you like how an IM or Google Hangouts would.

Olark can be set up in minutes and it provides a simple but effective way to offer on-site chat support to your customers.

The API. Olark has always had a great api which makes integrating their product with products like ours (ActiveDEMAND) very easy. Our team has been very happy with how easy it was to build a solid, deep integration.