- auto-integrate with your joomla users
- makes the chat private for guests (if you want to)
- gives you total moderation control
- looks very solid, and functions properly
- total controls over the logs
IMPORTANT: All the best words for Mr. Peter Saitz and blastchat crew, who provided me swift and detailed support on the configuration AND implementation of the chat into my site (although it wasn't that connected to the chat). All compliments to responding in less then hour on most mails.
I believe placing blastchat link on the site is quite a fair thing to do considering you can use it for free, considering the effort these guys put into it. Payed version is very fairly priced, and has great options too.
NOTE: I had a problem of placing user login form on the same menu/page as the chat. If you logoff from the same page, chat will report an error, because joomla keeps the data while you're still on page. I solved it by removing the login form from the chat window page. Hope it helps you.