Again, it will all depend what your centre of gravity is. Other than tourists and oligarchs, Knightsbridge and to a lesser degree Park Lane are devoid of anything of interest to a large majority of London residents and visitors - I say this as someone who used to live just off Park Lane
I'd suggest for many the centre of gravity is much closer to Kings X (just North of Mayfair, Soho, Covent Garden, close to Regents Park, etc.) than the properties further west which only really make sense if you want that vibe, are working further West (Kensington, Hammersmith) or intend to spend your time at Harrods.