i tried it (since 2012), it`s ok for home use, fast and snappy even on an old 32bit machine, but still no way to password protect the system.
the DE is quite different from everything else i seen so far, also there used to be a linux distro with a similar DE (ZeOS maybe), but it was unstable
i keep an usb stick with haiku close by, as i never know when i`m gonna need it, so far i used it to retrieve data from 2 old computers, where linux (ubuntu) failed me
the haiku anyboot file can work as live image or installer
this is one BSD distro that Linux users should definitely try…