See I dry everything on it. Towels, bed sheets, jeans. You just have to load it right. I hang pillow cases on bottom rung, fitted sheet folded on middle layer and duvet cover folded into quarters on the top layer. I have the cover for it, but if I put it on before bed, so 10pm, it's dry by 7am. Same with towels. Fold them in half and spread them across a whole layer and they dry over night. You sometimes get a damp 'edge' where it hangs over, but I just put the towels in the airing cupboard to store anyway, so they dry.
Heavier items of clothes you just need to spread out a bit more. Jeans need a few more bars than a cotton t shirt.
I love mine. Baby clothes and lighter items of clothes dry brilliantly, but not in a few hours, I tend to put it on overnight.