Don't let the price put you off. You're getting a belting pack of coils that work out at 50p each. As long as you are not using to sweet a juice you can get a month out of a coil with ease. Every time I change cotton I give a quick pulse and clean and good to go again. Comes out at 0.9 ohms on a dual coil setup. Very little hotspots when put into deck. Easy to cut and robust enough to handle plenty movement to position where you like without distortion.
Majority of my tanks have these bad boys installed. Banging flavour from them all. And for a fiver for 10 its worth the gamble to be fair.