I'm very tempted, is £390 ish + fitting really a bargain? Can you notice it that much?
Yes, absolutely. I fitted them one at a time, and every piece I put on made an immense difference to the car. I think that the mid x-brace actually does the least in terms of feel, but in conjunction with the other three bits you end up with a wonderfully communicative chassis that's very adjustable on the limit.