I found this to be a very capable VNC viewer. Here are the key points I found most useful:
* The keyboard metakeys get passed through as youd expect (cmd-~, cmd-tab, cmd-m, etc), and there is an escape sequence to start sending meta keys to the host system instead of sent through to the server.
* Fullscreen mode is excellent, I find the drop down of the host menubar/chrome to be not too intrusive.
* It has performed well connecting to older (os9 VINE) servers, embedded (AddrLink iPEPS) servers, and OSX.
* The bonjour host discovery pane is the most robust Ive encountered. It includes two different hostnames ("Users Mac Pro.local" and "macpro.local"), and includes wide-area bonjour entries, the SRV records registered on your DNS server.