It seems that, as with other Richard Seifert buildings, this one has attracted both landmark status and architectural criticism.  The City of London Pevsner Guide describes it as, "... the excessively large block between Leather Lane and Hatton Garden (with) Plum-tinted glazing between pale stone floor bands.  Clumsy ground-floor shopping arcade."  Elsewhere it is charcterized as, "... an impressive glass-fronted office building".  I suppose what you can say is that whatever your point of view Seifert's buildings rarely go unnoticed.