Does anyone have one of these installed in their bathroom? Are they any good? We have been looking at the all in one ready made cubicles by companies like Vitalux and Lisna Waters. They cost between 1 and 2 grand or thereabouts. But today, in a bathroom showroom, the man working there told us they were cheaply made and absolute rubbish and we would be better having an expensive custom made one. Well he would, wouldn't he?! But I wondered if anyone had any experience of the ready made ones they could share please?