I am looking at Boldchat [http://www.boldchat.com].

It looks like nice software. Anyone use it?

Yes, we used it. It's easy to use. But some times the connection was very slow and the design of the chat screen was bad.

Tried it before and it's ok as a basic solution but not really suitable for a big company.

If you are looking for a reliable solution, take a look at LivePerson (http://www.livechatdir.com/liveperson-review.html). We use it at www.m2mhost.com