Nothing but love about this! I recently had my hair bleached back to blond (which is my natural colour) but there were a lot of brassy/orange strands. I left the toner on for 15/20 minutes and it's a gorgeous pale blonde which is very close to my own shade, and most important, it's all an even colour. Might give a purplish/grayish tint if it's left on for too long, so you might want to watch out with that.
(Emailed Review from Lily)