it is different, there is no doubt of that,
i have had half a dozen holidays on the canals and have never been asked to pay a mooring fee, free mooring is available on 90% of the towpaths on the system, i found if you hire a cruiser stern boat you can all sit out, also outside seating in the bow area,
the pace is a lot slower and turning needs to be planned,, by turning i mean going about, a 60ft boat does not turn in a 30ft wide canal so planning is essential, i did not find the boats claustrophobic at all,
different but enjoyable, give it a go