A few years ago we took my Daughters family with us and thought it would be good for the grandkids to have a dingy. It was excellent from the fun perspective, and really usefull at Ranworth when we moored on the Island. Two trips both ways had all off us ready to explore and eat on the staith.
The were two drawbacks, one already mentioned by Jeff. The other was the frantic activity when you started going astern only to have one of the crew shout "the boat". Easy to forget it was there when you don't usually hire one. It was close to being an ex boat when I turned around at Norwich.