Wall hung toilets and waterless urinals

We have a customer that is trying to get LEED certification on their building. They are considering using dual flush wall mount toilets with Gerberit in-wall tank/carrier (44 total) and Waterless, Inc urinals (12 total). We have installed both in residential homes, but they are interested in getting feedback from anyone that has used them in commercial applications. Not so much on the installation aspects, more on the maintenance side.
If anyone can share their experience it would be greatly appreciated.

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