I recently visited an Ikea store that had the waterless urinals. I did not notice any bad smells. In fact, it smelled better than most public bathrooms.
I would imagine that the janitorial staff at an Ikea would be a tad more vigilant than in some other places.
My experiences with them are in government buildings, where after the waterless urinals being in place for 6 months the janitorial neglect became obvious by the smell.
It took another 6 months for the facility managers to have the urinals returned to the flush urinals.
The same will happen with these waterless urinals, I'm confident.