Im not sure what the previous reviewer was doing with their curlers, but I love mine :) and based on that review I felt compelled to even the score.
Granted they do not curl like hot rollers and my only complaint would be the heat, I think they would be better if they could attain a hotter temperature - but hey, what do you want for £15??
Its also useful to remember they are jumbo curlers and therefore the curl will always be softer. Having said that, they provide my hair with a nice curl - and my hair is long with few layers and straight by nature. They help to add shine to my hair, and rather feel like the curling equivalent to straighteners, if that makes sense to you. I have used these on my friend who has long layered hair and with some decent hairspray, went out looking more Baywatch than Battersea.
So dont write these curlers off, they are useful and I wouldnt be without mine.
Hope that balances things :)