We hired the "Grey Heron" from Anderton possibly around about the same time, partly because it had the stove fitted, and were "Persuaded Not to use the Bubble Stove as we would not need it". The man doing the show around said that they were planning to remove them as they were more trouble than they were worth.
We decided that we Would use it, and found it to give out lots of heat once you had got it going. There seemed to be a knack to getting it started which involved partly dismantling the burner, and placing a firelighter in a small pool of diesel at the bottom, lighting it and reassembling the burner then closing the door. Our stove did not burn quite right as the chimney that was fitted seemed to be a bit short and did not provide the correct draught.
As you say, the diesel central heating was not very good as you could not have it running all night due to battery consumption, unlike the gas c / heating fitted to most hire boats.