It looks to me like all the lower cabinets have concealed hinges - these often come with European frameless or full-overlay style cabinets. Blum hardware is a well known brand that many cabinet manufacturers use.

to both sides of the sink there are false fronts - no hinges - my client wanted generous storage below the sink - so we left it wide open inside!

So wide open meaning... no shelves, no pull out's? Maybe the client is storing large items in those back corners that are not used very often. One would think it would be awkward to retrieve those items. None the less, this is an outstanding design and it's on my wish list for my future kitchen. Thank you for all your information. All your designs are beautiful! :)

correct- she preferred awkwardness to losing the 2' x 2' corner "dead" space to the left of the dishwasher and to the right of the sink cabinet. best with your kitchen- i would be happy to design it for you :)