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Pro Even the website owners have no access to the data
Because the encryption keys are generated in client browser and never sent to the server.
Pro All communiction is also encrypted with AES-256
All this encryption takes place at client side, so that even the server administrators have no access to the data.
Pro No need to install anything
Pro All communication is protected with TLS (SSL)
Pro No need to create an account
But creating an account can be useful, too: while having an account the key exchange can be done through public key cryptography.
Pro You can delete messages any time
Pro Chatlink.com does not track or follow you in any way
It does not save any cookies or have any external links (like Google Adwords for example) that could track you.
Pro Chatlink.com is open source
The source code is available here. Being open source allows anyone to audit the code.