I have the Revlon 1100 Watt 3 Heat 2 Speed Pro that goes for about $60 (CAD) on Amazon. I have super straight hair and love it – it took some time and YouTube tutorials to get the hang of it but I can get salon-level blowouts or big waves out of it now. I never blow-dry my hair, but air drying leaves it frizzy and really highlights the random kink in the middle, so this tool has been a lifesaver.
My hairdresser warned me that none of these brushes should be used as a hair dryer even though that’s often part of their name. They work best when hair is mostly dried.