This was my first experience with Silversea, having travelled with around a dozen other cruise lines over the decades. Silversea wins hands down!
I had the lowest (and presumably the lowliest) of cabins (428), which I jokingly referred to as being 'below the Plimsoll Line.'
It was incredibly spacious, with a huge and comfortable bed, lounge suite and two armchairs, walk in robe and ample storage, a bathroom larger than my own, desk, coffee table, further mirrored ledges, and a generous ocean view. The toiletries were Bvulgari, the in-suite fridge stocked and replenished with beverages of my choice, VIP treatment from both the butler and his assistant, who despite being totally professional, felt like 'family' throughout.
Perfect - see comments above. No need to go higher!!