I've travelled extensively in Italy, it's my favourite country. Plus, while living in North London I had two excellent, authentic Sardinian restaurants on my doorstep - Pane Vino and Nuraghe, in Kentish Town and Dartmouth Park.
I've given Le Querce three chances, which I believe is more than enough. It's far too expensive for what it is, where it is, and what it looks like (which is a disgrace, quite frankly). I live two minutes away so I desperately wanted to love it! We've ordered both the specials and the regulars - not impressed either way. The maitre'd/owner is extremely offputting. So, that's it for me.
I'd be very interested in what people 'expect' when they go to a (albeit well-regarded) local Italian restaurant and pay £80-90 for two. And I'd also question why we should expect to pay more for *Sardinian* ingredients than mainland Italian? Perhaps the former poster could enlighten us?
(Disclaimer: I am crotchety today)