She totally lost it when she got into writing about the Mayfair witches. They were useless and repetitive.
She lost it about the time of Memnoch the Paperweight. Anything written after that - rubbish. Esp. anything where Lestat has been replaced by pod-Lestat, in lurve with the horrendous girl.
Merrick, Blackwood Farm - terrible.
Her first four vamp chron books were good - that's it.