Best straighteners under �40?

I got some from Tesco. I'm afraid I can't tell you the exact price as they were a present, but I know Teso's bad but these straightners work a miracle. My brother has frizzy curly hair and it took one kind of "through" to be straight, and it doesn't burn. Start at the top, leave for 2 seconds then pull down not too hard. Hope this helps please reply.