I get sent the EV the weekend after it appears, so I've only just done this. I hope Vismut will read the words of praise on here, to which I add my own. For me the supreme achievement was writing such fine clues despite the severe constraints imposed on them. I haven't done this full justice because I don't possess a set of coloured pens - and I'm tempted to go out and buy one just for this!
It took me a while to understand the shading - I got the yellows and the 43 cells the wrong way round at first - but was delighted to have a superb challenge on a weekend when (for me) there is no Listener crossword.
The IQ this week is terrific too!