4 /5 Marcel van Kampenhout: My review concerns the River Lee Navigation here. See also my reviews of the Regents Canal and Hartford Union Canal.
There are also restaurants and cafes along this stretch. Its safe, often with a dedicated cycle path alongside.
The boats here are initially well-maintained, but as you head north, things get increasingly rough and chaotic. A few boats are dangerously tilted; for one, its definitely too late.