I bought one for DD2 about four years ago when she got married - the tall one, just the same as now sold by Lakeland but then sold by Coopers for about £60. She got such good use from it that I bought another a year later for DD1 when she bought her first flat. When DD2 emigrated last year she passed it on to her SIL. They really have been life-savers for all three girls, none of whom have room for tumblers, and have coped well with the washing for all the babies. I bought myself one of the small ones, which is a sort of table-shaped - a rack of half a dozen horizontal heat bars with collapsible legs. It is complete rubbish. Barely gets warm and takes forever to dry anything. But now I see that maybe I've been using it wrongly, just draping a single layer over each bar like a washing line. I will try piling layers of stuff on it flat and see if it does a better job.
Legend had it that a small one like mine used the same electricity as a light bulb, and a tall one four light bulbs.