I’ve drunk it, it’s good but not outstanding, better than most sub £59 bottles but not as good as the better champagnes. At a similar price, Ruinart is what I look for unless they have a Bollinger Grand Annee, that’s lovely stuff. At the cheaper end of the spectrum Drappier is very, very good for the money and Aldi have the best supermarket fizz, there standard stuff (£12 per bottle) is good, there posh stuff (£15 ish) is astonishing for that price.
Edit, if you’re in the Midlands, pop into Nickolls and Perks in Stourbridge, they have a cracking selection offer some good advice and also sell a huge range of whiskey. And Aldi is round the corner from them as well!