We have the large size Lakeland heated airer and we use it for all the clothes that can’t be tumbled - some shirts, some leisure wear, many of my clothes - trousers, jackets, linen, silk, wool etc.
We use it with the cover and it doesn’t generate noticeable condensation, though we put our extractor fan on, too. If we put a load of washing on it on a Sunday afternoon, it’s dry by Monday night/Tuesday morning. We certainly haven’t noticed any significant increases in our electricity costs.
The downside is that it’s quite large and our utility room is quite small, so it takes up a significant amount of the space, when it’s erected. When it’s not in use, it folds flat and the cover zips down to a smaller size to cover it.
It’s a million times better than having a clothes horse full of damp clothes, for days and days, in the cold/wet weather. We also don’t have clothes draped over the radiators!
Our cats love to sleep under it, when it’s on, as if it’s some sort of 5* cat sauna. ?
We (and the cats) recommend it. ?