As you might expect, it is great!
I bought their pale denim aymmetric maxi skirt - I vaguely remembered this from fashion journalista articles - down from £45 to £13 approx, and another, darker ankle length denim skirt with a more stream lined cut, for £10. These are going to be so useful for festivals and as a more flattering alternative to jeans.
They also have Jaeger at 70% off, though I couldn't see anything I could use.
And it is also nice, in a small way, to support M and S as they try to sort themselves out after an awful summer - we don't want to lose them. I mean, there are great bargains, so I guess they won't make much profit on this, but they must really want the turnover and the space for new stock.
So go and have a look in your local M and S! (and no, I don't work for them 😏)